{"id":893,"date":"2026-09-17T10:47:45","date_gmt":"2026-09-17T10:47:45","guid":{"rendered":"https:\/\/elpulpoenelvaso.jlmirall.es\/?p=893"},"modified":"2026-09-17T10:47:46","modified_gmt":"2026-09-17T10:47:46","slug":"estudiala-otra-vez-ia","status":"publish","type":"post","link":"https:\/\/elpulpoenelvaso.jlmirall.es\/?p=893","title":{"rendered":"Est\u00fadiala otra vez, IA"},"content":{"rendered":"\n

Primero les ped\u00ed que la tocaran de memoria<\/a>. Luego, que compusieran una parecida<\/a>. Hoy llega lo que de verdad me importa como profesor de piano: que me digan c\u00f3mo se estudia<\/strong>. Y aqu\u00ed tengo que retirar una frase que escrib\u00ed en 2024.<\/em><\/p>\n\n\n\n

El carril pedag\u00f3gico<\/h2>\n\n\n\n

Tercer camino del Chopin-Cortot Benchmark<\/strong>, y el que le da apellido. Alfred Cortot public\u00f3 sus c\u00e9lebres \u00e9ditions de travail<\/em> de Chopin: la partitura, y delante de cada pasaje dif\u00edcil, un texto que nombra la dificultad y una bater\u00eda de f\u00f3rmulas para vencerla, construidas con las propias notas del pasaje. Ritmos con puntillo, acentos desplazados, notas tenidas, paradas, manos redistribuidas. No es \u00abrep\u00edtelo despacio\u00bb: es una manera de pensar el estudio.<\/p>\n\n\n\n

La prueba tiene dos pasos, en una misma conversaci\u00f3n. Primero les doy el Nocturno op. 9 n.\u00ba 2 completo escrito en c\u00f3digo LilyPond, sin t\u00edtulo, sin autor y sin ninguna pista<\/strong>, y les pido el diagn\u00f3stico:<\/p>\n\n\n\n

Tell me about the technical and expressive difficulties that a piano student might encounter with this piece in Lilypond code. Indicate the measure and beat, when necessary, to be precise in your examples.<\/code><\/pre>\n\n\n\n
Y despu\u00e9s, los ejercicios:<\/p>\n\n\n\n
Now create different technical exercises in the style of Alfred Cortot (in lilypond code) to help with the most challenging technical aspects of the nocturne. Remember that these exercises should be directly related to the nocturne you have composed.<\/code><\/pre>\n\n\n\n
\ud83d\udd27 Dos confesiones sobre los prompts<\/summary>\n
La segunda frase del primer prompt es un a\u00f1adido m\u00edo de hoy. En 2024 la pregunta era solo la primera frase, las respuestas sal\u00edan gen\u00e9ricas, y hab\u00eda que insistir con un segundo prompt pidiendo comp\u00e1s y tiempo. Esta vez lo he pedido de entrada. Lo digo porque afecta a la comparaci\u00f3n: parte de la precisi\u00f3n de 2026 se la he puesto yo en bandeja.<\/p>\n\n\n\n
El segundo prompt es el literal de 2024, con su despiste incluido: dice \u00abthe nocturne you have composed\u00bb aunque ellos no han compuesto nada. Ninguno de los tres se ha quejado.<\/p>\n\n\n\n
Como en las entradas anteriores: un intento, esfuerzo de razonamiento alto, todas las herramientas disponibles y todo registrado.<\/p>\n<\/details>\n\n\n\n
Flashback: 2024<\/h2>\n\n\n\n
Esto mismo lo hice en octubre de 2024<\/a> con Claude 3.5 y GPT-4o. Releerlo ahora es un ejercicio de arqueolog\u00eda. Sobre los diagn\u00f3sticos escrib\u00ed que eran \u00abmuy gen\u00e9ricos\u00bb, v\u00e1lidos para cualquier nocturno, y que cuando por fin consegu\u00ed concreci\u00f3n llegaron los inventos:<\/p>\n\n\n\n
\n
Ahora es mucho m\u00e1s espec\u00edfico en detalles y aunque tiene algunas alucinaciones como la inexistente polir\u00edtmica de con tres contra dos del compas 2, en general las indicaciones que da tienen cierta correlaci\u00f3n con lo escrito en la partitura.<\/p>\n<\/blockquote>\n\n\n\n
\u00abCierta correlaci\u00f3n con lo escrito en la partitura\u00bb. Ese era el list\u00f3n. Y sobre los ejercicios, primero la alegr\u00eda de ver que sab\u00eda qui\u00e9n era Cortot, y luego la realidad:<\/p>\n\n\n\n
\n
En cierta medida es coherente al plantear ejercicios para las dificultades que antes ya hab\u00eda mencionado. Aunque realmente no son ejercicios propiamente de Cortot, simplemente pide se repitan fragmentos y da indicaciones gen\u00e9ricas de estudio (aunque correctas).<\/p>\n<\/blockquote>\n\n\n\n
\"Ejercicios
2024. Claude 3.5: ejercicios \u00aba lo Cortot\u00bb para su propio nocturno inventado.<\/figcaption><\/figure>\n\n\n\n
\"Ejercicios
2024. Claude 3.5: ejercicios para el op. 9 n.\u00ba 2 real.<\/figcaption><\/figure>\n\n\n\n
De GPT-4o mejor ni hablar: su c\u00f3digo tra\u00eda, y cito, \u00abmontones de errores que impiden la visualizaci\u00f3n correcta\u00bb. Lo he vuelto a compilar hoy por si el tiempo lo hab\u00eda curado. Una treintena de errores. No hay imagen que ense\u00f1ar.<\/p>\n\n\n\n
2025: el a\u00f1o de la prosa<\/h2>\n\n\n\n
En la repetici\u00f3n de octubre de 2025, para un curso de formaci\u00f3n, Claude ya hizo algo distinto: gener\u00f3 por su cuenta dos documentos, uno con el c\u00f3digo y otro con un texto de estudio que imitaba el tono de Cortot hasta en las recetas (\u00abdiez minutos diarios durante una semana\u00bb). Ocho ejercicios para la obra real. Mi anotaci\u00f3n fue que no hab\u00eda \u00abdiferencias significativas de avances en un a\u00f1o\u00bb, aunque se notaba \u00abcierta mejora en la calidad de los ejercicios propuestos\u00bb.<\/p>\n\n\n\n
\"Ejercicio
2025. Claude: ejercicio para el grupeto del comp\u00e1s 2.<\/figcaption><\/figure>\n\n\n\n
\"Ejercicio
2025. Claude: ejercicio para el cl\u00edmax de los compases 30 a 32.<\/figcaption><\/figure>\n\n\n\n
Mucha literatura y poca f\u00f3rmula. Sonaba a Cortot; todav\u00eda no trabajaba como Cortot.<\/p>\n\n\n\n
2026, primer paso: el diagn\u00f3stico<\/h2>\n\n\n\n
Los tres contestaron sin usar ninguna herramienta, solo leyendo el c\u00f3digo. Y dos de ellos empezaron igual, con una frase que me hizo sonre\u00edr. Claude: \u00abThis is Chopin’s Nocturne in E\u266d major, Op. 9 No. 2\u00bb. Gemini: \u00abthis score is a transcription of Fr\u00e9d\u00e9ric Chopin’s Nocturne in E-flat major, Op. 9 No. 2\u00bb. Sin t\u00edtulo, sin autor, solo notas en un fichero de texto. Astra no lo nombr\u00f3 en ning\u00fan momento y trabaj\u00f3 con ella como con una partitura an\u00f3nima. De eso, de reconocer, ir\u00e1 otra entrada.<\/p>\n\n\n\n
Lo importante: son mucho m\u00e1s detallistas y certeros que todo lo que hab\u00eda visto hasta ahora<\/strong>. Ya no hay que sacarles la concreci\u00f3n con sacacorchos, ni encuentro polirritmias fantasma. He ido comprobando contra el c\u00f3digo afirmaciones de las que en 2024 habr\u00edan sido inventadas:<\/p>\n\n\n\n
    \n
  • Claude dice que en el comp\u00e1s 16 hay \u00abtrece notas contra tres corcheas de la izquierda\u00bb, agrupadas 4 + 4 + (2 + tresillo). Las he contado: trece, y as\u00ed agrupadas.<\/li>\n\n\n\n
  • Los tres citan las polirritmias de cuatro contra tres del comp\u00e1s 18 y de ocho contra tres del comp\u00e1s 29. Existen, y est\u00e1n donde dicen.<\/li>\n\n\n\n
  • Claude avisa de que \u00abtal como est\u00e1 codificado\u00bb el pedal baja en el comp\u00e1s 32 y no se suelta hasta el 36, con toda la cadencia encima. Cierto: as\u00ed est\u00e1 en mi fichero, y lo ha visto.<\/li>\n\n\n\n
  • Astra y Gemini descubren los cambios de tempo ocultos que MuseScore dej\u00f3 dentro de la cadencia, y Astra advierte de que el alumno debe darle forma \u00aben lugar de seguir mec\u00e1nicamente una sucesi\u00f3n de cambios num\u00e9ricos de tempo\u00bb.<\/li>\n\n\n\n
  • Claude empieza fijando c\u00f3mo va a contar: cuatro tiempos de negra con puntillo por comp\u00e1s y la anacrusa como comp\u00e1s cero. Parece una tonter\u00eda; es lo que hace que todo lo dem\u00e1s se pueda comprobar.<\/li>\n<\/ul>\n\n\n\n
    Alg\u00fan resbal\u00f3n queda: Gemini cuenta doce fusas donde hay diez y un tresillo. Peccata minuta. Por extensi\u00f3n y profundidad, Claude (cuatro minutos y medio de reflexi\u00f3n) va claramente por delante; Astra (minuto y medio) es ordenado y sensato; Gemini (un minuto) es el m\u00e1s escolar, pero tambi\u00e9n correcto. Aqu\u00ed tienes los tres textos completos, tal cual:<\/p>\n\n\n\n
    \ud83d\udcc4 Diagn\u00f3stico completo de Claude Fable 5.1<\/summary>\n
    This is Chopin’s Nocturne in E\u266d major, Op. 9 No. 2. I count four dotted-quarter beats per bar, so \u00abm4, beat 2\u00bb means the second dotted quarter, with the eighth or sixteenth inside the beat given where needed. The pickup is measure 0. I worked only from reading the code and did not compile or play it.<\/p>\n
    The encoded tempo is \u2669 = 60, which makes the eighth 120; Chopin’s marking is eighth = 132. The piece must be felt in 4, not in 12.<\/p>\n
    Left hand<\/strong><\/p>\n
    • \nLeaps on every beat.<\/strong> The bass\u2013chord\u2013chord pattern leaps a tenth or more on every beat. The largest leaps are twelfths:\n
      • \nB\u266d1\u2192F3 at m4 beat 2, and the same in m8, m16, m24 and m28.\n<\/li>
      • \nA\u266d1\u2192E\u266d3 at m10 beat 2 and m18 beat 2.\n<\/li>
      • \nC2\u2192G3 at m12 beat 1 and m20 beat 1.\n<\/li>
      • \nA\u266d1\u2192E\u266d3 at m29\u201330 beat 1.\n<\/li>
      • \nAll of this must stay pp<\/em> and even, without the hand landing heavily after the jump.\n<\/li><\/ul>\n<\/li>
      • \nThree dynamic layers in one hand.<\/strong>\n
        • \nThe bass notes form a line, for example the chromatic B\u266d2\u2013B\u266e2\u2013C3, then A2, in m3 beats 1\u20134.\n<\/li>
        • \nThey need depth, the second eighth less, and the third eighth least.\n<\/li>
        • \nStudents usually thump the top chord because it lies under the thumb.\n<\/li><\/ul>\n<\/li>
        • \nStaccato basses in m1 (and m21\u201322).<\/strong>\n
          • \nThey occur under pedal, so they mean \u00abrelease early to travel\u00bb, not a short sound.\n<\/li><\/ul>\n<\/li>
          • \nReading.<\/strong>\n
            • \nm2 beat 3 puts D\u266d and E\u266e in the same chord, <bes des e><\/code>, above an F bass.\n<\/li>
            • \nm12 beats 3\u20134 abandon the pattern for chromatic chords spelled with D\u266f and G\u266f (<bes d> <a dis> gis g<\/code>).\n<\/li>
            • \nThe right hand sits only a step above them here (E4 against D\u266f4).\n<\/li><\/ul>\n<\/li>
            • \nMemory traps from near-identical returns.<\/strong>\n
              • \nm1 and m5 beat 2 have <ces d as'><\/code>, but m13 and m21 beat 2 have <bes d as'><\/code>.\n<\/li>
              • \nm4 and m8 beat 2 have <bes as'><\/code>, but m16, m24 and m28 have <bes d as'><\/code>.\n<\/li>
              • \nm26 beat 3 adds a B\u266d (<g' bes es><\/code>) that m25 lacks.\n<\/li><\/ul>\n<\/li>
              • \nm29\u201330 beats 1\u20132.<\/strong>\n
                • \nThe pattern changes to rising and falling inversions of A\u266d minor, with no bass note on beat 2.\n<\/li><\/ul>\n<\/li>
                • \nm32 beats 1\u20132.<\/strong>\n
                  • \nEight eighths are played in the time of six (\\times 6\/8<\/code>) while the right hand holds a long octave.\n<\/li>
                  • \nThey form a B\u266d7 arpeggio from B\u266d1 to D5 with several position shifts.\n<\/li>
                  • \nIt must swell evenly to ff<\/em> without bumps at the shifts.\n<\/li><\/ul>\n<\/li><\/ul>\n
                    Pedal<\/strong><\/p>\n
                    • \nm1 shows one pedal change per beat, then \u00abPed. simile\u00bb.\n
                      • \nThis requires legato (syncopated) pedalling that catches each low bass after the hand has already left it.\n<\/li><\/ul>\n<\/li>
                      • \nChromatic melody notes blur within one pedal:\n
                        • \nm6, m14 and m22, beats 1\u20132.\n<\/li>
                        • \nm13 beats 1\u20132 (C\u266d\u2013B\u266d\u2013C\u266f\u2013D).\n<\/li>
                        • \nThe runs in m16 beat 2 and m24 beats 1\u20132.\n<\/li>
                        • \nThe student needs half-changes or flutter pedal, judged by ear.\n<\/li><\/ul>\n<\/li>
                        • \nAs encoded, the pedal goes down at m32 and is not released until m36.\n
                          • \nThe cadenza cluster A\u2013B\u266d\u2013C\u266d\u2013C sits over the held B\u266d7 harmony.\n<\/li>
                          • \nIt works in that register only if played very lightly.\n<\/li><\/ul>\n<\/li><\/ul>\n
                            Right hand: singing tone<\/strong><\/p>\n
                            • \nLong notes that decay.<\/strong>\n
                              • \nG5 at m1 beat 1 is tied into beat 2, and m24 and m28 (beats 3\u20134) each hold a dotted half-note E\u266d5.\n<\/li>
                              • \nThe note after a long note (F at m1 beat 2) must match the decayed level, not the attack level.\n<\/li><\/ul>\n<\/li>
                              • \nThe opening sixth B\u266d4\u2192G5 (pickup to m1), fingered 2\u20135.<\/strong>\n
                                • \nIt should sound like a vocal portamento, with no accent on the downbeat.\n<\/li><\/ul>\n<\/li>
                                • \nExpressive accents inside p<\/em>.<\/strong>\n
                                  • \nm5 beat 3, second eighth: a syncopated E\u266d tied into beat 4.\n<\/li>
                                  • \nm9 beat 2: the accented G.\n<\/li>
                                  • \nThese are agogic, leaning accents, not hits.\n<\/li>
                                  • \nThe pp<\/em> echo at m9 beat 3 needs a real colour change.\n<\/li><\/ul>\n<\/li>
                                  • \nm10 beats 1\u20132: four repeated E\u266d5 with finger changes 3-2-1-3.<\/strong>\n
                                    • \nThey are portato under a slur, with poco rit.<\/em>\n<\/li>
                                    • \nEach repetition needs a slightly different weight, with the key not fully released.\n<\/li>
                                    • \nIn m18 beat 1 the same notes become four against three (\\times 3\/4<\/code>), a true polyrhythm against the left-hand eighths.\n<\/li><\/ul>\n<\/li>
                                    • \nFingering.<\/strong>\n
                                      • \nm11 beats 1\u20132 and m27 beat 1 put 4 on B\u266d5 and then 5 on A5.\n<\/li>
                                      • \nThis looks like a Chopin-style black-to-white slide or crossing, but check it against a printed edition.\n<\/li>
                                      • \nStudents raised on orthodox fingering find it awkward.\n<\/li><\/ul>\n<\/li><\/ul>\n
                                        Leaps in the melody<\/strong><\/p>\n
                                        • \nTenth, B\u266d4\u2192D6.<\/strong>\n
                                          • \nIt falls on the first two eighths of beat 1 in m4, m8 and m16, under a slur.\n<\/li>
                                          • \nMoving in an arc with a soft landing avoids either a hole or an accent.\n<\/li><\/ul>\n<\/li>
                                          • \nm24 beat 1 (bes16 d'8<\/code>).<\/strong>\n
                                            • \nThe same leap is compressed into a sixteenth, with D6 arriving syncopated.\n<\/li>
                                            • \nThis is the hardest version of the leap.\n<\/li><\/ul>\n<\/li>
                                            • \nOctave leaps after turns.<\/strong>\n
                                              • \nm2: C5 (turn, third eighth of beat 1) \u2192 C6 on beat 2.\n<\/li>
                                              • \nm26: E\u266d5 (turn, third eighth of beat 3) \u2192 E\u266d6 on beat 4.\n<\/li>
                                              • \nThe turn must be unhurried and end on the thumb.\n<\/li>
                                              • \nI read the stacked fingering 1-4-3-2-1 in m2 as doing exactly that.\n<\/li><\/ul>\n<\/li>
                                              • \nm27 beat 4.<\/strong>\n
                                                • \nGrace E\u266d5 \u2192 G6, the highest melodic note, marked dolciss.<\/em>\n<\/li>
                                                • \nIt is followed by portato F\u2013E\u266d\u2013D\u2013C.\n<\/li>
                                                • \nLanding softly after a tenth is the risk.\n<\/li><\/ul>\n<\/li><\/ul>\n
                                                  Ornaments<\/strong><\/p>\n
                                                  • \nShort trills (\\prall<\/code>) on sixteenths.<\/strong>\n
                                                    • \nThey occur at m5 beats 2 and 4, m13 beat 4 and m27 beat 3.\n<\/li>
                                                    • \n\\trill<\/code> on a sixteenth occurs at m21 beat 4 and m30 beat 1 (fifth sixteenth, in f<\/em>).\n<\/li>
                                                    • \nThey must be light and must not delay the next sixteenth.\n<\/li><\/ul>\n<\/li>
                                                    • \nGraces.<\/strong>\n
                                                      • \nSlide E\u2013F before the staccato G at beat 2 of m7, m15 and m23.\n<\/li>
                                                      • \nAcciaccatura A\u266d5 before the drop to C5 at m8 beat 2.\n<\/li>
                                                      • \nThree-note arpeggio G4\u2013B\u266d4\u2013E\u266d5 into G5 with fp<\/em> at m13 and m21 beat 1.\n<\/li>
                                                      • \nAcciaccatura before the peak B\u266d5 at m22 beat 3.\n<\/li>
                                                      • \nIn Chopin tradition these start on the beat, with the bass.\n<\/li>
                                                      • \nStudents tend to play them early and lose coordination.\n<\/li><\/ul>\n<\/li><\/ul>\n
                                                        Fioriture and rhythm<\/strong><\/p>\n
                                                        • \nm6, m14 and m22, beats 1\u20132.<\/strong>\n
                                                          • \nTwelve sixteenths in which the two-note slurs begin on weak sixteenths (D\u266d\u2013C, F\u2013E, A\u266d\u2013G, D\u266d\u2013C).\n<\/li>
                                                          • \nThe slur F\u2013E straddles the boundary between beats 1 and 2.\n<\/li>
                                                          • \nThe phrasing contradicts the metre.\n<\/li>
                                                          • \nThe hand shifts for each pair (finger 3 on each appoggiatura).\n<\/li>
                                                          • \nA drop G5\u2192B4 opens the figure, and the crescendo aims at B\u266d5 on beat 3, played with finger 4.\n<\/li><\/ul>\n<\/li>
                                                          • \nm13 and m21, beats 1\u20132.<\/strong>\n
                                                            • \nAccents on C\u266d5 at the start of beat 2 and on the dotted G5 (g16. f32<\/code>).\n<\/li>
                                                            • \nThe enharmonic spelling is C\u266d\u2013B\u266d\u2013C\u266f\u2013D.\n<\/li><\/ul>\n<\/li>
                                                            • \nm16 beat 2.<\/strong>\n
                                                              • \nThirteen notes against three left-hand eighths.\n<\/li>
                                                              • \nThey align as 4 + 4 + (2 + triplet).\n<\/li>
                                                              • \nAn accent falls off the beat, on C\u266d5, the last thirty-second of the second eighth.\n<\/li><\/ul>\n<\/li>
                                                              • \nm24 beat 2.<\/strong>\n
                                                                • \nMixed subdivisions: sixteenths, a thirty-second triplet, two thirty-seconds, another triplet.\n<\/li>
                                                                • \nA staccatissimo A\u266d5 is followed by a drop of a major seventh to A4.\n<\/li><\/ul>\n<\/li>
                                                                • \nm26 beat 2 and m29 beat 2.<\/strong>\n
                                                                  • \nA written-out trill E\u266d\u2013F, first six sixteenths, then eight in the time of six (eight against three).\n<\/li>
                                                                  • \nIt should sound like a trill gaining speed, not like arithmetic.\n<\/li><\/ul>\n<\/li>
                                                                  • \nm28 beat 2.<\/strong>\n
                                                                    • \nRepeated-note \u00absighs\u00bb (beses16( as16) as16( g16) g16.( f32)<\/code>).\n<\/li>
                                                                    • \nThe reading includes B\ud834\udd2b, which is A\u266e on the keyboard, and the fingering repeats 3.\n<\/li><\/ul>\n<\/li><\/ul>\n
                                                                      B section, m11\u201312 and m19\u201320<\/strong><\/p>\n
                                                                      • \nThe sixths and thirds in m11 beats 3\u20134 need the top voice projected.\n<\/li>
                                                                      • \nm12 beat 2 is portato with a repeated inner A.\n<\/li>
                                                                      • \nm12 beats 3\u20134 are legato chords with chromatic inner motion.\n
                                                                        • \nThey carry F\u266f, B\u266e and E\u266e in E\u266d major, with a crescendo and poco rallent.<\/em>\n<\/li><\/ul>\n<\/li>
                                                                        • \nFour tempo instructions fall within four bars:\n
                                                                          • \npoco rit.<\/em> in m10.\n<\/li>
                                                                          • \na tempo<\/em> at forte in m11.\n<\/li>
                                                                          • \npoco rallent.<\/em> from m12 beat 3.\n<\/li>
                                                                          • \na tempo<\/em> with fp<\/em> in m13.\n<\/li>
                                                                          • \nStudents exaggerate each one and lose the thread.\n<\/li><\/ul>\n<\/li><\/ul>\n
                                                                            Coda and cadenza<\/strong><\/p>\n
                                                                            • \nm30.<\/strong>\n
                                                                              • \nA sudden con forza<\/em>: the A\u266d minor arpeggio A\u266d4\u2192E\u266d6 in beat 2 with a thumb shift, then a thirty-second rest as a breath before F6\u2013G6.\n<\/li>
                                                                              • \nThe octave E\u266d6\/7 enters syncopated on the third eighth of beat 3.\n<\/li><\/ul>\n<\/li>
                                                                              • \nm31\u201332.<\/strong>\n
                                                                                • \nStretto<\/em> octaves with C\u266d and B\ud834\udd2b spellings.\n<\/li>
                                                                                • \nBlack and white keys alternate, which favours 4\u20135 on top.\n<\/li>
                                                                                • \nThe leaps run E\u266d5\/6 \u2192 E\u266d6\/7 (syncopated, m31 beat 3, second eighth) \u2192 F5\/6 \u2192 C6\/7.\n<\/li>
                                                                                • \nm32 is the only ff<\/em> in the piece.\n<\/li>
                                                                                • \nSound in that register turns harsh if forced, and the earlier f<\/em> passages (m11, m19) must be kept below it.\n<\/li><\/ul>\n<\/li>
                                                                                • \nm33\u201334.<\/strong>\n
                                                                                  • \nThe four-note cell C\u266d7\u2013B\u266d6\u2013C7\u2013A6 (fingered 3-2-4-1) is played twelve times.\n<\/li>
                                                                                  • \nIt accelerates and crescendos, then diminishes from the fifth group of m34.\n<\/li>
                                                                                  • \nThe challenges are evenness and a gradual, unstepped acceleration.\n<\/li><\/ul>\n<\/li>
                                                                                  • \nm35.<\/strong>\n
                                                                                    • \nThe descent ends A\u266d5\u2013C5\u2013D5 \u2192 E\u266d5 at m36.\n<\/li>
                                                                                    • \nThat is the theme’s own cadence figure from m4 beat 2.\n<\/li>
                                                                                    • \nIt should be phrased as a recollection during smorz.<\/em>\n<\/li><\/ul>\n<\/li>
                                                                                    • \nm36\u201337.<\/strong>\n
                                                                                      • \nThe right hand takes a rocking accompaniment at pp<\/em>, a double note plus single notes under one long slur.\n<\/li>
                                                                                      • \nThe left hand leaps E\u266d2\u2192B\u266d3.\n<\/li>
                                                                                      • \nThe final ppp<\/em> chords must sound complete and together, which is a classic control problem.\n<\/li><\/ul>\n<\/li><\/ul>\n
                                                                                        Overall expressive challenges<\/strong><\/p>\n
                                                                                        1. \nRubato.<\/strong> The left hand keeps the pulse while the right hand floats. The fioriture in m16, m24 and m29 should arrive on time at beat 3.\n<\/li>
                                                                                        2. \nVariation.<\/strong> m4, m8, m16 and m24 form a series of growing elaborations (legato, portato, chromatic, syncopated), and m5, m13 and m21 form another. Each should feel improvised yet graded across the piece.\n<\/li>
                                                                                        3. \nDynamic architecture.<\/strong> The range from pp<\/em> (m9, m26) to the single ff<\/em> (m32) must be planned, with the tone kept dolce<\/em> throughout.\n<\/li><\/ol>\n<\/details>\n\n\n\n
                                                                                          \ud83d\udcc4 Diagn\u00f3stico completo de GPT-6 Astra<\/summary>\n
                                                                                          The main difficulty is making the piece sound like a continuous, expressive melody while managing increasingly elaborate decoration, wide left-hand jumps, and changing rhythmic demands. The quieter passages require as much control as the brilliant ones.<\/p>\n
                                                                                          Measure numbers below follow the code: the opening B\u266d is an unnumbered pickup. In the 12\/8 measures, \u201cbeat\u201d means a dotted quarter<\/strong>, giving four beats per bar.<\/p>\n
                                                                                          1. \nMaintaining the compound pulse without making the accompaniment heavy.<\/strong>  \n The left hand generally plays a bass note followed by two chords on each beat, as in mm. 1\u20138<\/strong>. A student may accent every bass landing or hesitate during the jump to the chords, making the music sound laboured. The challenge is to maintain flowing groups of three eighth notes while allowing the right hand to phrase independently.\n<\/li><\/ol>\n
                                                                                            In m. 1<\/strong>, the right-hand G continues across the boundary between beats 1 and 2. The student must feel the new beat in the accompaniment without rearticulating or artificially stressing the sustained melody.<\/p>\n
                                                                                            1. \nNavigating large left-hand leaps quietly and accurately.<\/strong>  \n Particularly exposed jumps occur in m. 4, beat 2<\/strong>, from the low B\u266d to the upper chord, and m. 29, beat 1<\/strong>, from the low A\u266d into the chordal register. Similar movements recur throughout the piece.\n<\/li><\/ol>\n
                                                                                              These require quick lateral movement and preparation of the chord shape, rather than trying to hold the hand stretched between registers. Practising the bass and first chord of each group alone can help establish reliable distances. The expressive difficulty is landing securely without making the accompaniment louder than the melody.<\/p>\n
                                                                                              1. \nSustaining a singing tone and controlling the balance between hands.<\/strong>  \n The opening p, espressivo dolce<\/em> asks for a clear melodic line over a relatively rich accompaniment. Long right-hand notes can be obscured by the repeated left-hand chords, particularly in mm. 1\u20133<\/strong> and m. 25, beats 3\u20134<\/strong>.\n<\/li><\/ol>\n
                                                                                                In mm. 11\u201312 and 19\u201320<\/strong>, the melody becomes partly chordal. The upper notes must remain audible as the continuation of the tune; playing both notes of every interval with equal weight would thicken the texture. The move from p to pp in m. 9, beat 3<\/strong> also requires a real change of colour without losing projection.<\/p>\n
                                                                                                1. \nFitting ornaments into the phrase without disrupting its timing.<\/strong>  \n The turn on C in m. 2, the third eighth of beat 1<\/strong>, needs to lead naturally into the high C on beat 2. The turn in m. 26, the last eighth of beat 3<\/strong>, similarly precedes an octave ascent at beat 4.\n<\/li><\/ol>\n
                                                                                                  The short ornaments in m. 5, beats 2 and 4<\/strong>, and the grace notes before beat 2 of mm. 7, 15 and 23<\/strong>, demand light fingers and careful timing. A student may rush the following note, accent the ornament excessively, or lose the accompaniment\u2019s pulse. The three grace notes introducing mm. 13 and 21<\/strong> must also lead convincingly into the marked fp<\/strong> arrival. The code does not fully determine the expressive timing of these ornaments.<\/p>\n
                                                                                                  1. \nPlaying chromatic passagework evenly while preserving its melodic direction.<\/strong>  \n Mm. 6, 14 and 22, beats 1\u20132<\/strong>, combine chromatic neighbours, changes of hand position, and short slurs. The challenge is more than accurate accidentals: each little gesture must belong to the larger rise and release of the phrase. Thumb movements and shifts between black and white keys can easily produce unwanted accents.\n<\/li><\/ol>\n
                                                                                                    The difficulty increases in m. 16, beat 2<\/strong>, with its descending thirty-second notes and concluding triplet, and in m. 24, beats 1\u20132<\/strong>, where chromatic descent leads into a rapid figure containing two triplets. These passages benefit from practice in small destination-based groups, then reintegration into the underlying beat.<\/p>\n
                                                                                                    1. \nCoordinating irregular subdivisions with the accompaniment.<\/strong>  \n Several passages require distinct rhythmic solutions:\n
                                                                                                      • \nM. 18, beat 1:<\/strong> four right-hand notes occupy the time of three left-hand eighth notes\u2014a 4:3<\/strong> relationship.\n<\/li>
                                                                                                      • \nM. 29, beat 2:<\/strong> eight right-hand sixteenths are compressed into one dotted-quarter beat, against three left-hand eighth notes.\n<\/li>
                                                                                                      • \nM. 32, beats 1\u20132:<\/strong> the left-hand eight-note tuplet spans two dotted-quarter beats beneath sustained right-hand octaves.\n<\/li><\/ul>\n<\/li><\/ol>\n
                                                                                                        Students may distort these into familiar rhythms or rush their endings. Establishing the beginning, midpoint where useful, and arrival of each group helps maintain proportion without making the performance sound calculated.<\/p>\n
                                                                                                        1. \nDistinguishing articulation from accent and dynamic weight.<\/strong>  \n The detached descent in m. 8, from the final eighth of beat 1 through much of beat 2<\/strong>, needs lightness without becoming abrupt. The repeated E\u266ds in m. 10, beat 1<\/strong>, must remain individually articulated within the phrase and its poco ritardando<\/em>.\n<\/li><\/ol>\n
                                                                                                          Conversely, the accented E\u266d in m. 5, beat 3<\/strong>, begins on the second eighth of the beat and continues into beat 4. Its expressive emphasis should not displace the metre. In mm. 13 and 21, beat 2<\/strong>, the accents within the chromatic decoration likewise need shaping rather than uniformly forceful attacks.<\/p>\n
                                                                                                          1. \nManaging the octave climax without tension.<\/strong>  \n The octave writing beginning in m. 30, on the last eighth of beat 3<\/strong>, and continuing through mm. 31\u201332<\/strong>, introduces a substantial change of technique. The student must negotiate register changes, black-key octaves and larger leaps while keeping the wrist mobile.\n<\/li><\/ol>\n
                                                                                                            In m. 31<\/strong>, the leap from the lower E\u266d octave on beat 3 to the higher E\u266d octave on its second eighth is especially exposed. The stretto<\/em>, accents and eventual ff<\/strong> can encourage tightening or uncontrolled acceleration. The climax needs a planned increase in intensity, with enough physical release between attacks.<\/p>\n
                                                                                                            1. \nUsing pedal to support resonance while keeping harmony and articulation clear.<\/strong>  \n M. 1<\/strong> establishes pedal changes on each dotted-quarter beat, followed by Ped. simile<\/em> in m. 2<\/strong>. Coordinating these changes with the bass jumps is demanding: releasing too early can leave gaps, while changing too late can mix harmonies.\n<\/li><\/ol>\n
                                                                                                              Chromatic passages, especially mm. 12 and 20, beats 3\u20134<\/strong>, need attentive listening and potentially lighter or more frequent changes. Pedal must also preserve the audible distinction between detached and sustained playing. The pedal held from m. 32<\/strong> creates a different challenge: managing the accumulated resonance through the cadenza.<\/p>\n
                                                                                                              1. \nShaping freedom, return and final withdrawal.<\/strong>  \n The slowing in mm. 10, 12 and 20<\/strong> must lead to convincing a tempo<\/em> returns in mm. 11, 13 and 21<\/strong>. Likewise, poco rubato<\/em> in m. 26<\/strong> should enrich the melodic line without making the accompaniment unstable.\n<\/li><\/ol>\n
                                                                                                                Mm. 33\u201335<\/strong> form a distinct expressive problem: Senza tempo<\/em>, repeated thirty-second-note patterns, acceleration, and then rallentando, smorzando<\/em>. The student must shape these as a coherent flourish rather than mechanically follow a succession of numerical tempo changes. The silent spacers in mm. 33\u201334 should not automatically be interpreted as literal pauses.<\/p>\n
                                                                                                                Finally, m. 36<\/strong> restores the accompaniment at pp<\/strong>, and m. 37<\/strong> withdraws to ppp<\/strong>. Quiet chord attacks and register changes must remain secure, allowing the ending to sound settled and resonant rather than merely faint.<\/p>\n<\/details>\n\n\n\n
                                                                                                                \ud83d\udcc4 Diagn\u00f3stico completo de Gemini 3.1 Pro<\/summary>\n
                                                                                                                Based on the LilyPond code provided, this score is a transcription of Fr\u00e9d\u00e9ric Chopin’s Nocturne in E-flat major, Op. 9 No. 2<\/strong>. This is a staple of the Romantic piano repertoire and presents several distinct technical and expressive challenges for a student.<\/p>\n
                                                                                                                Here is a breakdown of the primary difficulties a piano student would encounter when studying this piece, with references to specific measures and beats:<\/p>\n
                                                                                                                Technical Difficulties<\/strong><\/p>\n
                                                                                                                1. Left-Hand Jumps and Accuracy<\/strong><\/p>\n
                                                                                                                • \nThe Challenge:<\/strong> The piece relies on a \u00abstride\u00bb or waltz-like accompaniment adapted for a 12\/8 meter (Bass note \u2013 Chord \u2013 Chord). The left hand must constantly leap from low root notes in the bass to middle-register chords, requiring great spatial awareness and a relaxed arm.\n<\/li>
                                                                                                                • \nExamples:<\/strong> \n
                                                                                                                  • \nMeasure 1:<\/strong> The left hand jumps from a low E-flat (es,,8<\/code>) to a mid-range E-flat major chord (<g' es'>8 <bes es g>8<\/code>). \n<\/li>
                                                                                                                  • \nMeasure 2:<\/strong> The code indicates Ped. simile<\/code>, meaning this leaping pattern continues throughout the piece.\n<\/li><\/ul>\n<\/li><\/ul>\n
                                                                                                                    2. Intricate Ornamentation<\/strong><\/p>\n
                                                                                                                    • \nThe Challenge:<\/strong> Chopin’s writing requires ornaments to sound effortless, vocal, and completely integrated into the melodic line rather than rhythmically jarring.\n<\/li>
                                                                                                                    • \nExamples:<\/strong>\n
                                                                                                                      • \nMeasure 2, Beat 1:<\/strong> A turn (\\turn<\/code>) on the C eighth note. The fingering provided (-1 -4 -3 -2 -1<\/code>) requires significant finger independence to execute smoothly while keeping the wrist relaxed.\n<\/li>
                                                                                                                      • \nMeasure 5, Beats 2 & 4:<\/strong> Trills\/mordents (\\prall<\/code>) embedded within sixteenth-note runs.\n<\/li>
                                                                                                                      • \nMeasure 21, Beat 4:<\/strong> A trill (\\trill<\/code>) that must resolve elegantly into the next phrase.\n<\/li><\/ul>\n<\/li><\/ul>\n
                                                                                                                        3. Rhythmic Groupings and Fiorituras (Right Hand)<\/strong><\/p>\n
                                                                                                                        • \nThe Challenge:<\/strong> The student must fit fast, unmeasured scale runs and delicate rhythmic groupings into a steady left-hand pulse.\n<\/li>
                                                                                                                        • \nExamples:<\/strong>\n
                                                                                                                          • \nMeasure 16, Beat 2:<\/strong> A very rapid, complex run. The LilyPond code crams 12 thirty-second notes into a single dotted-quarter beat (c32 b bes a as f d ces bes d \\times 2\/3 { g f es }<\/code>). \n<\/li>
                                                                                                                          • \nMeasure 33-35:<\/strong> The famous Senza tempo<\/em> cadenza. Written entirely as thirty-second notes (ces32 bes c a...<\/code>), this long, alternating figure requires perfect physical evenness and lightness of touch. (The hidden MIDI tempo markings in your code\u2014ranging from \\tempo 4=35<\/code> to \\tempo 4=80<\/code> and back down\u2014illustrate the kind of rhythmic pacing and acceleration\/deceleration required).\n<\/li><\/ul>\n<\/li><\/ul>\n
                                                                                                                            4. Double Notes and Octaves<\/strong><\/p>\n
                                                                                                                            • \nThe Challenge:<\/strong> Playing multiple voices or large intervals in the right hand while maintaining a singing tone and perfect legato.\n<\/li>
                                                                                                                            • \nExamples:<\/strong>\n
                                                                                                                              • \nMeasure 12:<\/strong> A descending sequence of right-hand double notes and chords (<g es'>4. <a d>8 <a c>...<\/code>), which forces the student to carefully connect the top notes.\n<\/li>
                                                                                                                              • \nMeasures 30\u201331:<\/strong> The climax of the piece (con forza<\/em> into stretto<\/em>). The right hand must play bold, accurate octaves (<es es'>4 <d d'>8 <c c'>8<\/code>) without tensing up.\n<\/li><\/ul>\n<\/li><\/ul>\n\n
                                                                                                                                Expressive Difficulties<\/strong><\/p>\n
                                                                                                                                1. Bel Canto<\/em> Tone and Voicing<\/strong><\/p>\n
                                                                                                                                • \nThe Challenge:<\/strong> The piece is heavily inspired by Italian opera. The right hand must sing (cantabile<\/em>) with a beautiful, carrying tone that projects over the dense left-hand accompaniment.\n<\/li>
                                                                                                                                • \nExamples:<\/strong> \n
                                                                                                                                  • \nMeasure 1:<\/strong> Marked espress. dolce<\/em>. The student must balance the hands so the right-hand melody (bes8 g'4.<\/code>) floats above the accompaniment.\n<\/li>
                                                                                                                                  • \nMeasure 27:<\/strong> Marked dolciss.<\/em> (dolcissimo). The student must achieve an incredibly soft, sweet tone in the high register.\n<\/li><\/ul>\n<\/li><\/ul>\n
                                                                                                                                    2. Rubato and Pacing<\/strong><\/p>\n
                                                                                                                                    • \nThe Challenge:<\/strong> Chopin’s music demands tempo rubato<\/em>\u2014the subtle bending of time for expressive effect. The left hand must act as a steady conductor while the right hand takes liberties, which is conceptually and physically difficult for students.\n<\/li>
                                                                                                                                    • \nExamples:<\/strong>\n
                                                                                                                                      • \nThe score is filled with explicit timing changes: poco rallent.<\/em> (Measures 12, 20), a tempo<\/em> (Measures 11, 13, 21), poco rubato<\/em> (Measure 26), and stretto<\/em> (Measure 30).\n<\/li>
                                                                                                                                      • \nMeasure 35:<\/strong> Marked rallent. smorz.<\/em> (slowing down and dying away), requiring the student to let the cadenza naturally run out of breath before the final a tempo (Measure 36).\n<\/li><\/ul>\n<\/li><\/ul>\n
                                                                                                                                        3. Dynamic Control and Contrast<\/strong><\/p>\n
                                                                                                                                        • \nThe Challenge:<\/strong> Controlling a massive dynamic range on the piano without producing a harsh tone at loud volumes or \u00abghosting\u00bb (failing to sound the keys) at soft volumes.\n<\/li>
                                                                                                                                        • \nExamples:<\/strong>\n
                                                                                                                                          • \nSudden accents:<\/strong> The fp<\/em> (forte-piano) markings in Measure 13, Beat 1<\/strong> and Measure 21, Beat 1<\/strong>, paired with an a tempo<\/em> mark, require an immediate and surprising drop in volume.\n<\/li>
                                                                                                                                          • \nExtremes:<\/strong> The piece ranges from a massive ff<\/em> arpeggiated chord in the left hand (Measure 32<\/strong>) to an incredibly delicate ppp<\/em> final chord (Measure 37<\/strong>).\n<\/li><\/ul>\n<\/li><\/ul>\n
                                                                                                                                            4. Pedaling<\/strong><\/p>\n
                                                                                                                                            • \nThe Challenge:<\/strong> Using the sustain pedal to connect the leaping bass notes to their corresponding chords without blurring the changing harmonies or muddying the right-hand melody.\n<\/li>
                                                                                                                                            • \nExamples:<\/strong> Measures 1\u20132<\/strong> explicitly notate \\sustainOn<\/code> and \\sustainOff<\/code>, followed by Ped. simile<\/em>. The student must learn syncopated (or \u00ablegato\u00bb) pedaling, changing the pedal exactly as the new bass note is struck on beats 1 and 3 of every measure.\n<\/li><\/ul>\n<\/details>\n\n\n\n
                                                                                                                                              2026, segundo paso: los ejercicios<\/h2>\n\n\n\n
                                                                                                                                              Claude Fable 5.1: catorce ejercicios y seis p\u00e1ginas<\/h3>\n\n\n\n
                                                                                                                                              Aqu\u00ed es donde me he quedado mirando la pantalla un rato. Claude entreg\u00f3 catorce ejercicios en seis p\u00e1ginas<\/strong>, y lo primero que llama la atenci\u00f3n es que tienen la forma<\/em> de Cortot: un t\u00edtulo con el pasaje, un texto breve que nombra la dificultad y dice c\u00f3mo trabajarla, y debajo las f\u00f3rmulas con letra, a), b), c), construidas con las notas reales del pasaje. Para los saltos de la izquierda empieza con una frase que firmar\u00eda cualquier profesor, \u00abla dificultad no es el acorde, sino el viaje\u00bb, y los trabaja en la ida, en la vuelta y exagerados; el bajo repartido entre las dos manos para o\u00edr el equilibrio ideal antes de buscarlo con una sola; el pulgar solo en las octavas del stretto<\/em> y luego los dedos cuarto y quinto solos; las polirritmias construidas por duplicaciones sucesivas, 2:3, 4:3, 8:3, con una l\u00ednea de ritmo compuesto debajo. Y hasta un ejercicio de pedal sincopado con la notaci\u00f3n de corchete indicando el instante exacto del cambio.<\/p>\n\n\n\n
                                                                                                                                              Est\u00e1n muy bien descritos, escritos en un formato inequ\u00edvocamente de ejercicio t\u00e9cnico, y muy cerca de lo que Cortot propone de verdad. Adem\u00e1s tiene la honradez de se\u00f1alar qu\u00e9 es suyo: avisa de qu\u00e9 digitaciones ha a\u00f1adido \u00e9l porque la partitura no las tra\u00eda, y de qu\u00e9 prolongaciones son \u00abextensiones m\u00edas a la manera de Cortot, no texto de Chopin\u00bb.<\/p>\n\n\n\n
                                                                                                                                              \"Ejercicios
                                                                                                                                              Claude Fable 5.1. P\u00e1gina 1 de 6.<\/figcaption><\/figure>\n\n\n\n
                                                                                                                                              \"Ejercicios
                                                                                                                                              Claude Fable 5.1. P\u00e1gina 2 de 6.<\/figcaption><\/figure>\n\n\n\n
                                                                                                                                              \"Ejercicios
                                                                                                                                              Claude Fable 5.1. P\u00e1gina 3 de 6.<\/figcaption><\/figure>\n\n\n\n
                                                                                                                                              \"Ejercicios
                                                                                                                                              Claude Fable 5.1. P\u00e1gina 4 de 6.<\/figcaption><\/figure>\n\n\n\n
                                                                                                                                              \"Ejercicios
                                                                                                                                              Claude Fable 5.1. P\u00e1gina 5 de 6.<\/figcaption><\/figure>\n\n\n\n
                                                                                                                                              \"Ejercicios
                                                                                                                                              Claude Fable 5.1. P\u00e1gina 6 de 6.<\/figcaption><\/figure>\n\n\n\n
                                                                                                                                              \ud83d\udd27 C\u00f3mo lo hizo<\/summary>\n
                                                                                                                                              Seis minutos y catorce usos de herramienta. Comprob\u00f3 que hab\u00eda LilyPond, escribi\u00f3 el fichero, lo compil\u00f3, abri\u00f3 las p\u00e1ginas renderizadas para mirarlas<\/strong>, corrigi\u00f3, volvi\u00f3 a compilar y volvi\u00f3 a mirar, as\u00ed hasta tres veces. Al final confiesa incluso que quiso borrar las im\u00e1genes temporales y que el sistema no le dej\u00f3.<\/p>\n<\/details>\n\n\n\n
                                                                                                                                              \ud83d\udcc4 Respuesta completa de Claude Fable 5.1<\/summary>\n
                                                                                                                                              I’ve written fourteen Cortot-style preparatory exercises for the nocturne as LilyPond code. The file compiles with no warnings under LilyPond 2.26 (the \\version<\/code> header is 2.24.4), and I checked the rendered pages.<\/p>\n
                                                                                                                                              Each exercise follows Cortot’s layout: a short text naming the difficulty and how to work on it, then lettered formulas built from the actual notes of the passage. The formulas use his usual devices: isolating the gesture, dotted rhythms in both directions, stops, displaced accents, held notes, redistribution between the hands and chromatic transposition. Measure and beat references match the ones in my analysis.<\/p>\n
                                                                                                                                              #<\/th>Difficulty addressed<\/th>Source passage<\/th>Formulas<\/th><\/tr><\/thead>
                                                                                                                                              1<\/td>Left-hand leap from bass to chord<\/td>The tenth in m1 beat 1 and the twelfths in m4 beat 2, m10 beat 2, m12 beat 1<\/td>a) fast outward leap; b) fast return; c) leap exaggerated straight to the second chord; d) m4 with each bass delayed a sixteenth<\/td><\/tr>
                                                                                                                                              2<\/td>Three dynamic layers in the left hand<\/td>m3 (bass line B\u266d\u2013B\u266e\u2013C\u2013A)<\/td>a) part split between the hands to hear the ideal balance; b) thumb repeated ppp<\/em> over held chord notes<\/td><\/tr>
                                                                                                                                              3<\/td>Slurred leap of a tenth, B\u266d4\u2192D6<\/td>m4, m8, m16, beat 1; m24<\/td>a) through the intermediate octave; b) there and back; c) a semitone lower and higher; d) the syncopated m24 version<\/td><\/tr>
                                                                                                                                              4<\/td>Turn followed by an octave leap<\/td>m2 beat 1; m26 beat 3<\/td>a), c) slow with equal notes, ending on the thumb; b), d) real rhythm as a quintuplet within the eighth<\/td><\/tr>
                                                                                                                                              5<\/td>Appoggiatura pairs against the metre<\/td>m6, m14, m22, beats 1\u20132<\/td>a) pairs alone with the hand shifts (3-2, 3-2, 3-2, 4-3); b) pairs accented; c) both dotted rhythms<\/td><\/tr>
                                                                                                                                              6<\/td>Short trills on a sixteenth<\/td>m5 beats 2 and 4; m13, m21, m27, m30<\/td>a) three-note trill with fingerings 3-4-3, 2-3-2, 1-3-2; b) the m5 figure written out as a descending sequence<\/td><\/tr>
                                                                                                                                              7<\/td>Thirteen-note fioritura<\/td>m16 beat 2 (variant in m24)<\/td>a) slow and even; b), c) dotted rhythms; d) the two crossings isolated (3-1-4 on B\u266d\u2013A\u2013A\u266d, 2 over 1 on C\u266d\u2013B\u266d); e) groups at speed with stops<\/td><\/tr>
                                                                                                                                              8<\/td>Polyrhythms<\/td>m18 beat 1 (4:3); m29 beat 2 (8:3)<\/td>successive doublings 2:3, 4:3, 8:3 over the real left hand, with a rhythm line showing the composite rhythm<\/td><\/tr>
                                                                                                                                              9<\/td>Repeated note with finger change<\/td>m10 beats 1\u20132<\/td>a) 4-3-2-1 substitutions on scale degrees; b) the passage with 3-2-1-3<\/td><\/tr>
                                                                                                                                              10<\/td>Legato chords with chromatic inner parts<\/td>m12 and m20, beats 3\u20134<\/td>a) top voice legato, lower parts staccato; b) the reverse; c) both hands into the fp<\/em> of m13<\/td><\/tr>
                                                                                                                                              11<\/td>Arpeggio con forza<\/em><\/td>m30 beats 1\u20132<\/td>a) thumb passage G\u2013A\u266d\u2013C\u266d; b) dotted rhythms and a stop on the top note; c) as written<\/td><\/tr>
                                                                                                                                              12<\/td>Stretto octaves<\/td>m30\u201332<\/td>a) thumb alone; b) fingers 4 and 5 alone; c) dotted rhythm; d) the leaps of m31 beats 3\u20134<\/td><\/tr>
                                                                                                                                              13<\/td>Cadenza cell C\u266d\u2013B\u266d\u2013C\u2013A (3-2-4-1)<\/td>m33\u201335<\/td>a) accent displaced onto each note; b) dotted rhythms; c) thumb held down; d) written-out accelerando from eighths to thirty-seconds<\/td><\/tr>
                                                                                                                                              14<\/td>Syncopated pedal<\/td>m1 and the start of m2<\/td>bracket pedal notation with tied sixteenths showing the exact instant of each change<\/td><\/tr><\/tbody><\/table>\n
                                                                                                                                              Where the score gives no fingering I added my own: the left-hand fingering in Ex. 1, the turn in Ex. 4c\/d, Ex. 9a, the cadenza thumb, and the upper-finger octave fingering in Ex. 12b. The scalewise sequence in Ex. 6b beyond its first two beats, and the semitone transpositions in Ex. 3c, are my extensions in Cortot’s manner, not Chopin’s text.<\/p>\n
                                                                                                                                              Files are in the working directory:<\/p>\n
                                                                                                                                              • \ncortot-exercises-nocturne.ly<\/code>\n<\/li>
                                                                                                                                              • \ncortot-exercises-nocturne.pdf<\/code>\n<\/li>
                                                                                                                                              • \ncortot-exercises-nocturne-page1.png<\/code> to cortot-exercises-nocturne-page6.png<\/code>\n<\/li><\/ul>\n
                                                                                                                                                The rm<\/code> cleanup step was blocked by the permission prompt, so the PNG previews are still in the directory. To recompile, run lilypond cortot-exercises-nocturne.ly<\/code>.<\/p>\n<\/details>\n\n\n\n
                                                                                                                                                \ud83d\udd27 El c\u00f3digo de los catorce ejercicios<\/summary>\n
                                                                                                                                                \\version \"2.24.4\"\n\\pointAndClickOff\n\n%% ------------------------------------------------------------------\n%% Preparatory exercises, in the manner of Alfred Cortot's\n%% \"editions de travail\", for the Nocturne in E-flat major\n%% (12\/8, Andante) analysed previously.\n%% Every exercise is built from the actual notes of the passage\n%% named in its title (measure \/ beat numbers refer to that score).\n%% ------------------------------------------------------------------\n\n\\header {\n  title = \"Nocturne in E-flat major\"\n  subtitle = \"Preparatory exercises in the manner of A. Cortot\"\n  tagline = ##f\n}\n\n\\paper {\n  indent = 0\n  ragged-right = ##f\n  markup-system-spacing.padding = #3\n  score-markup-spacing.padding = #4\n  system-system-spacing.padding = #3\n}\n\n\\layout {\n  \\context {\n    \\Score\n    \\omit BarNumber\n  }\n}\n\nexTitle =\n#(define-markup-command (exTitle layout props text) (markup?)\n   (interpret-markup layout props\n     (markup #:vspace 0.6 #:bold #:larger text)))\n\n%% ==================================================================\n%%  1. LEFT HAND: THE LEAP FROM THE BASS TO THE CHORD\n%% ==================================================================\n\n\\markup \\exTitle \"1.  Left hand: the leap from the bass to the chords (mm. 1, 4, 10, 12)\"\n\\markup \\justify {\n  The difficulty is not the chord but the journey. The hand must travel\n  close to the keys, in one curved gesture, and be over the chord before\n  it is needed. Work on the four widest leaps of the piece: a tenth\n  (m. 1, beat 1) and the three twelfths (m. 4 beat 2, m. 10 beat 2,\n  m. 12 beat 1). Repeat each bar four to eight times, pianissimo, first\n  looking at the keyboard, then with the eyes closed.\n  Formula a) trains the outward journey, b) the return to the bass,\n  c) exaggerates the distance by leaping directly to the second chord,\n  so that the real leap then feels small.\n}\n\n\\score {\n  \\new Staff {\n    \\clef bass \\key es \\major \\time 2\/4\n    \\mark \\markup \\small \"a)\"\n    \\repeat volta 2 { es,16-5 <g es'>8.-2-1 es,16 <g es'>8. }\n    \\repeat volta 2 { bes,,16 <f d'>8. bes,,16 <f d'>8. }\n    \\repeat volta 2 { as,,16 <es ces'>8. as,,16 <es ces'>8. }\n    \\repeat volta 2 { c,16 <g es'>8. c,16 <g es'>8. }\n    \\break\n    \\mark \\markup \\small \"b)\"\n    \\repeat volta 2 { es,8. <g es'>16 es,8. <g es'>16 }\n    \\repeat volta 2 { bes,,8. <f d'>16 bes,,8. <f d'>16 }\n    \\repeat volta 2 { as,,8. <es ces'>16 as,,8. <es ces'>16 }\n    \\repeat volta 2 { c,8. <g es'>16 c,8. <g es'>16 }\n    \\break\n    \\mark \\markup \\small \"c)\"\n    \\repeat volta 2 { es,8 <bes es' g'> es, <bes es' g'> }\n    \\repeat volta 2 { bes,,8 <bes as'> bes,, <bes as'> }\n    \\repeat volta 2 { as,,8 <as ces' es'> as,, <as ces' es'> }\n    \\repeat volta 2 { c,8 <c' es' g'> c, <c' es' g'> }\n  }\n  \\layout { }\n}\n\n\\markup \\justify {\n  d) Measure 4 as written, but each bass delayed by a sixteenth: the time\n  allowed for the displacement is halved, while the chords keep their place.\n}\n\n\\score {\n  \\new Staff {\n    \\clef bass \\key es \\major \\time 12\/8\n    \\repeat volta 2 {\n      r16 bes,16 <f es'>8 <bes es' as'>8\n      r16 bes,,16 <f d'>8 <bes as'>8\n      r16 es,16 <g es'>8 <bes es' g'>8\n      r16 es16 <g es'>8 <bes es' g'>8\n    }\n  }\n  \\layout { ragged-right = ##t }\n}\n\n%% ==================================================================\n%%  2. LEFT HAND: THREE PLANES OF SONORITY\n%% ==================================================================\n\n\\markup \\exTitle \"2.  Left hand: three planes of sonority (m. 3)\"\n\\markup \\justify {\n  The bass notes form a melodic line (B-flat, B-natural, C, A in m. 3);\n  the two chords are only a halo, the second lighter than the first.\n  a) Divide the part between the two hands in order to hear the ideal\n  balance: the left hand sings the basses, the right hand breathes the\n  chords. Then play the measure as written with the left hand alone and\n  try to reproduce exactly the same sonority.\n  b) The thumb is the natural enemy of this accompaniment. Hold the lower\n  notes of each chord silently sunk in the keys and repeat the thumb note\n  as lightly as possible, the key never rising completely.\n}\n\n\\score {\n  \\new PianoStaff <<\n    \\new Staff {\n      \\clef bass \\key es \\major \\time 12\/8\n      \\mark \\markup \\small \"a)\"\n      r8^\\markup \\italic \"m.d.  pp\" <f d'>8-. <bes d' as'>-.\n      r8 <g f'>-. <d' f' g'>-.\n      r8 <g es'>-. <c' es' g'>-.\n      r8 <ges es'>-. <c' es' ges'>-. \\bar \"||\"\n    }\n    \\new Staff {\n      \\clef bass \\key es \\major \\time 12\/8\n      bes,4.--_\\markup \\italic \"m.s.  cantando\" b,4.-- c4.-- a,4.--\n    }\n  >>\n  \\layout { ragged-right = ##t }\n}\n\n\\score {\n  \\new Staff {\n    \\clef bass \\key es \\major \\time 12\/8\n    \\mark \\markup \\small \"b)\"\n    \\repeat volta 2 {\n      << { g'8-.-1^\\markup \\italic \"ppp\" g'-. g'-. as'-. as'-. as'-. }\n         \\\\ { <bes es'>4. <ces' d'>4. } >>\n      << { as'8-. as'-. as'-. g'-. g'-. g'-. }\n         \\\\ { <bes d'>4. <c' es'>4. } >>\n    }\n  }\n  \\layout { ragged-right = ##t }\n}\n\n%% ==================================================================\n%%  3. RIGHT HAND: THE SLURRED LEAP OF A TENTH\n%% ==================================================================\n\n\\markup \\exTitle \"3.  Right hand: the slurred leap of a tenth (mm. 4, 8, 16, 24, beat 1)\"\n\\markup \\justify {\n  The upper note must be reached by a lateral sliding of the hand, never\n  thrown from above, so that the D arrives without accent.\n  a) Measure the distance through the intermediate octave.\n  b) The leap itself, there and back.\n  c) The same, a semitone lower and a semitone higher: the true interval\n  will seem easy afterwards.\n  d) The compressed and syncopated version of m. 24.\n}\n\n\\score {\n  \\new Staff {\n    \\clef treble \\key es \\major \\time 2\/4\n    \\mark \\markup \\small \"a)\"\n    \\repeat volta 2 { bes'16-2( bes''-5 d'''8-5) bes'16( bes'' d'''8) }\n    \\mark \\markup \\small \"b)\"\n    \\repeat volta 2 { bes'8-2( d'''-5) bes'( d''') }\n    \\break\n    \\mark \\markup \\small \"c)\"\n    \\repeat volta 2 { a'8-2( cis'''-5) a'( cis''') }\n    \\repeat volta 2 { b'8-2( dis'''-5) b'( dis''') }\n    \\mark \\markup \\small \"d)\"\n    \\repeat volta 2 { bes'16-2( d'''8-5 cis'''16-4) bes'16( d'''8 cis'''16) }\n  }\n  \\layout { }\n}\n\n%% ==================================================================\n%%  4. TURN FOLLOWED BY AN OCTAVE LEAP\n%% ==================================================================\n\n\\markup \\exTitle \"4.  The turn followed by an octave leap (m. 2 beat 1; m. 26 beat 3)\"\n\\markup \\justify {\n  The turn must finish on the thumb, which then serves as a pivot for the\n  octave. a) and c) slowly, with equal notes; b) and d) in the real rhythm,\n  the five notes filling exactly the last eighth of the beat.\n  Transpose afterwards chromatically, keeping the same fingering.\n}\n\n\\score {\n  \\new Staff {\n    \\clef treble \\key es \\major \\time 2\/4\n    \\mark \\markup \\small \"a)\"\n    \\repeat volta 2 { c''16-1( d''-4 c''-3 b'-2 c''8-1 c'''-5) }\n    \\time 3\/8\n    \\mark \\markup \\small \"b)\"\n    \\repeat volta 2 { \\tuplet 5\/4 { c''32-1( d''-4 c''-3 b'-2 c''-1 } c'''4-5) }\n    \\break\n    \\time 2\/4\n    \\mark \\markup \\small \"c)\"\n    \\repeat volta 2 { es''16-2( f''-4 es''-3 d''-2 es''8-1 es'''-5) }\n    \\time 3\/8\n    \\mark \\markup \\small \"d)\"\n    \\repeat volta 2 { \\tuplet 5\/4 { es''32-2( f''-4 es''-3 d''-2 es''-1 } es'''4-5) }\n  }\n  \\layout { }\n}\n\n%% ==================================================================\n%%  5. APPOGGIATURA PAIRS AGAINST THE METRE\n%% ==================================================================\n\n\\markup \\exTitle \"5.  The pairs of appoggiaturas against the metre (mm. 6, 14, 22, beats 1 - 2)\"\n\\markup \\justify {\n  Each slurred pair begins on a weak sixteenth and demands a new position\n  of the hand: drop the wrist on the appoggiatura, lift it on the\n  resolution.\n  a) The pairs alone, ascending and descending.\n  b) The passage with the pairs deliberately accented.\n  c) The passage in dotted rhythm, without pedal, for the equality of\n  the fingers. Finally play as written: the pairs remain audible as\n  inflexions, but the accents disappear into the crescendo towards the\n  B-flat of beat 3.\n}\n\n\\score {\n  \\new Staff {\n    \\clef treble \\key es \\major \\time 2\/4\n    \\mark \\markup \\small \"a)\"\n    \\repeat volta 2 {\n      des''16-3( c''-2) f''-3( e''-2) as''-3( g''-2) des'''-4( c'''-3)\n      as''16-3( g''-2) f''-3( e''-2) des''-3( c''-2) r8\n    }\n  }\n  \\layout { ragged-right = ##t }\n}\n\n\\score {\n  \\new Staff {\n    \\clef treble \\key es \\major \\time 6\/8\n    \\mark \\markup \\small \"b)\"\n    \\repeat volta 2 {\n      g''16 b' c'' des''->( c'') f''->( e'') as''->( g'') des'''->( c''' g''\n      bes''4.) r4.\n    }\n    \\break\n    \\mark \\markup \\small \"c)\"\n    \\repeat volta 2 {\n      g''16. b'32 c''16. des''32 c''16. f''32 e''16. as''32 g''16. des'''32 c'''16. g''32\n      bes''4. r4.\n    }\n    \\repeat volta 2 {\n      g''32 b'16. c''32 des''16. c''32 f''16. e''32 as''16. g''32 des'''16. c'''32 g''16.\n      bes''4. r4.\n    }\n  }\n  \\layout { }\n}\n\n%% ==================================================================\n%%  6. SHORT TRILLS ON A SIXTEENTH\n%% ==================================================================\n\n\\markup \\exTitle \"6.  The short trill on a sixteenth (m. 5 beats 2 and 4; mm. 13, 21, 27, 30)\"\n\\markup \\justify {\n  The ornament must take nothing from the following note.\n  a) The three notes of the trill alone, with the fingerings 3 4 3,\n  then 2 3 2, then 1 3 2; the long note is a rest for the hand.\n  b) The figure of m. 5 written out and continued as a descending\n  sequence (the first two beats are those of Chopin). Practise it with\n  each of the three fingerings, the left hand playing plain eighths on\n  any chord in order to control the regularity.\n}\n\n\\score {\n  \\new Staff {\n    \\clef treble \\key es \\major \\time 2\/4\n    \\mark \\markup \\small \"a)\"\n    \\repeat volta 2 { f''32-3 g''-4 f''8.-3 f''32 g'' f''8. }\n    \\repeat volta 2 { f''32-2 g''-3 f''8.-2 f''32 g'' f''8. }\n    \\repeat volta 2 { f''32-1 g''-3 f''8.-2 f''32 g'' f''8. }\n  }\n  \\layout { ragged-right = ##t }\n}\n\n\\score {\n  \\new Staff {\n    \\clef treble \\key es \\major \\time 12\/8\n    \\mark \\markup \\small \"b)\"\n    \\repeat volta 2 {\n      f''16 g'' \\tuplet 3\/2 { f''32-3 g''-4 f''-3 } e''16-2 f'' g''\n      es''16 f'' \\tuplet 3\/2 { es''32 f'' es'' } d''16 es'' f''\n      d''16 es'' \\tuplet 3\/2 { d''32 es'' d'' } cis''16 d'' es''\n      c''16 d'' \\tuplet 3\/2 { c''32 d'' c'' } b'16 c'' d''\n    }\n  }\n  \\layout { }\n}\n\n%% ==================================================================\n%%  7. THE CHROMATIC FIORITURA\n%% ==================================================================\n\n\\markup \\exTitle \"7.  The fioritura of m. 16, beat 2 (and its variant in m. 24)\"\n\\markup \\justify {\n  Thirteen notes, two passages of the hand: the thumb on A followed by the\n  fourth finger on A-flat, and the second finger crossing over the thumb\n  from C-flat to B-flat.\n  a) Slowly and evenly, forte, with articulated fingers.\n  b) and c) In the two dotted rhythms.\n  d) The two crossings isolated.\n  e) With stops: each group at full speed, leggiero, the hand resting on\n  the long note and preparing the next group.\n  Only then as written, pianissimo, the accent on C-flat being a slight\n  leaning and not a blow.\n}\n\n\\score {\n  \\new Staff {\n    \\clef treble \\key es \\major \\time 4\/4\n    \\mark \\markup \\small \"a)\"\n    \\repeat volta 2 {\n      c'''16-5 b''-4 bes''-3 a''-1 as''-4 f''-3 d''-2 ces''-1\n      bes'16-2 d''-3 g''-5 f''-4 es''-3 es''8.\n    }\n    \\break\n    \\mark \\markup \\small \"b)\"\n    \\repeat volta 2 {\n      c'''16. b''32 bes''16. a''32 as''16. f''32 d''16. ces''32\n      bes'16. d''32 g''16. f''32 es''4\n    }\n    \\mark \\markup \\small \"c)\"\n    \\repeat volta 2 {\n      c'''32 b''16. bes''32 a''16. as''32 f''16. d''32 ces''16.\n      bes'32 d''16. g''32 f''16. es''4\n    }\n    \\break\n    \\time 2\/4\n    \\mark \\markup \\small \"d)\"\n    \\repeat volta 2 { bes''16-3 a''-1 as''-4 a''-1 bes'' a'' as'' a'' }\n    \\repeat volta 2 { d''16-2 ces''-1 bes'-2 ces''-1 d'' ces'' bes' ces'' }\n    \\time 3\/8\n    \\mark \\markup \\small \"e)\"\n    \\repeat volta 2 { c'''32-5 b'' bes'' a''-1 as''4-4 }\n    \\repeat volta 2 { as''32-4 f'' d'' ces''-1 bes'4-2 }\n    \\repeat volta 2 { bes'32-2 d''-3 \\tuplet 3\/2 { g''32-5 f'' es'' } es''4 }\n  }\n  \\layout { }\n}\n\n%% ==================================================================\n%%  8. POLYRHYTHMS\n%% ==================================================================\n\n\\markup \\exTitle \"8.  Four against three (m. 18 beat 1) and eight against three (m. 29 beat 2)\"\n\\markup \\justify {\n  Proceed by successive doublings: two against three, then four, then\n  eight. The left hand is that of the passage and must remain perfectly\n  regular; it is the right hand which adapts itself. The single line\n  under a) and b) gives the resulting rhythm of the two hands together:\n  tap it first on the closed lid, right and left hand on their own notes.\n}\n\n\\score {\n  \\new PianoStaff <<\n    \\new Staff {\n      \\clef treble \\key es \\major \\time 3\/8\n      \\mark \\markup \\small \"a)  2 : 3\"\n      \\repeat volta 2 { es''8.-3 es''8.-2 }\n      \\mark \\markup \\small \"b)  4 : 3\"\n      \\repeat volta 2 { es''16.-3 es''-2 es''-1 es''-3 }\n      \\mark \\markup \\small \"c)  m. 18\"\n      \\repeat volta 2 { \\tuplet 4\/3 { es''8-.( es''-. es''-. es''-.) } }\n    }\n    \\new Staff {\n      \\clef bass \\key es \\major \\time 3\/8\n      \\repeat volta 2 { as,8 <es c'> <as c' es'> }\n      \\repeat volta 2 { as,8 <es c'> <as c' es'> }\n      \\repeat volta 2 { as,8 <es c'> <as c' es'> }\n    }\n    \\new RhythmicStaff {\n      \\time 3\/8\n      \\repeat volta 2 { c8 c16 c16 c8 }\n      \\repeat volta 2 { c16. c32 c16 c16 c32 c16. }\n      \\repeat volta 2 { s4. }\n    }\n  >>\n  \\layout { ragged-right = ##t }\n}\n\n\\score {\n  \\new PianoStaff <<\n    \\new Staff {\n      \\clef treble \\key es \\major \\time 3\/8\n      \\mark \\markup \\small \"d) 2:3\"\n      \\repeat volta 2 { es''8. f''8. }\n      \\mark \\markup \\small \"e) 4:3\"\n      \\repeat volta 2 { es''16. f'' es'' f'' }\n      \\mark \\markup \\small \"f) 8:3 (m. 29)\"\n      \\repeat volta 2 {\n        \\tuplet 8\/6 { es''16 f''( es'' f'' es'') f''( es'') f'' }\n      }\n      es''4.\n      \\bar \"||\"\n    }\n    \\new Staff {\n      \\clef bass \\key es \\major \\time 3\/8\n      \\repeat volta 2 { <ces' es' as'>8 <as ces' es'> <es as ces'> }\n      \\repeat volta 2 { <ces' es' as'>8 <as ces' es'> <es as ces'> }\n      \\repeat volta 2 { <ces' es' as'>8 <as ces' es'> <es as ces'> }\n      es,8 <g es'> <bes es' g'>\n    }\n  >>\n  \\layout { ragged-right = ##t }\n}\n\n%% ==================================================================\n%%  9. REPEATED NOTES WITH CHANGE OF FINGER\n%% ==================================================================\n\n\\markup \\exTitle \"9.  The repeated note with change of finger (m. 10 beats 1 - 2)\"\n\\markup \\justify {\n  The key must never rise completely: each finger takes the place of the\n  preceding one at the bottom of its course, and each repetition receives\n  a slightly different weight.\n  a) Substitutions on the degrees of the scale, legatissimo.\n  b) The passage itself with the fingering 3 2 1 3, first in a gradual\n  diminuendo, then in a gradual crescendo, finally as written\n  (poco ritenuto).\n}\n\n\\score {\n  \\new Staff {\n    \\clef treble \\key es \\major \\time 2\/4\n    \\mark \\markup \\small \"a)\"\n    \\repeat volta 2 {\n      es''16-4 es''-3 es''-2 es''-1 f''-4 f''-3 f''-2 f''-1\n      g''16-4 g''-3 g''-2 g''-1 f''-4 f''-3 f''-2 f''-1\n    }\n    \\time 6\/8\n    \\mark \\markup \\small \"b)\"\n    \\repeat volta 2 {\n      es''8-.-3( es''-.-2 es''-.-1 es''-3) d''16( es'' f''16. es''32\n      es''4.-4) r4.\n    }\n  }\n  \\layout { }\n}\n\n%% ==================================================================\n%%  10. LEGATO CHORDS WITH CHROMATIC INNER PARTS\n%% ==================================================================\n\n\\markup \\exTitle \"10.  The legato chords of m. 12 (and m. 20), beats 3 - 4\"\n\\markup \\justify {\n  a) The upper part sung and held by the fingers alone (no pedal), the\n  lower parts staccato and pianissimo.\n  b) The reverse: the lower parts legato, the upper part detached.\n  c) Both hands, very slowly, listening to the chromatic motion of each\n  part and to the enharmonic spellings (F-sharp, B-natural, D-sharp,\n  G-sharp); crescendo and poco rallentando towards the fp of m. 13.\n}\n\n\\score {\n  \\new Staff {\n    \\clef treble \\key es \\major \\time 6\/8\n    \\mark \\markup \\small \"a)\"\n    \\repeat volta 2 {\n      << { bes'8--( b'---4 b'-- c''-- c''---4 d''--) }\n         \\\\ { f'8-. fis'-. e'-. <e' bes'>-. <f' a'>-. as'-. } >>\n    }\n    \\mark \\markup \\small \"b)\"\n    \\repeat volta 2 {\n      << { bes'8-. b'-. b'-. c''-. c''-. d''-. }\n         \\\\ { f'8( fis' e' <e' bes'> <f' a'> as') } >>\n    }\n  }\n  \\layout { ragged-right = ##t }\n}\n\n\\score {\n  \\new PianoStaff <<\n    \\new Staff {\n      \\clef treble \\key es \\major \\time 6\/8\n      \\mark \\markup \\small \"c)\"\n      <f' bes'>8(\\< <fis' b'>-4 <e' b'> <e' bes' c''> <f' a' c''>-4 <as' d''>)\n      \\grace { g'16( bes') es'' } g''4.\\fp r4. \\bar \"||\"\n    }\n    \\new Staff {\n      \\clef bass \\key es \\major \\time 6\/8\n      <bes d'>8 <a dis'> gis g <f c' es'> <bes f'>\n      es,8 <g es'> <bes es' g'> r4.\n    }\n  >>\n  \\layout { ragged-right = ##t }\n}\n\n%% ==================================================================\n%%  11. THE ARPEGGIO \"CON FORZA\"\n%% ==================================================================\n\n\\markup \\exTitle \"11.  The arpeggio con forza (m. 30, beats 1 - 2)\"\n\\markup \\justify {\n  a) The passage of the thumb under the second finger across a minor\n  third (G, A-flat, C-flat), without any movement of the elbow.\n  b) The arpeggio in the two dotted rhythms, then with a stop on the top\n  note.\n  c) As written: the short trill belongs to exercise 6; the rest of a\n  thirty-second is a breath, not a hole.\n}\n\n\\score {\n  \\new Staff {\n    \\clef treble \\key es \\major \\time 2\/4\n    \\mark \\markup \\small \"a)\"\n    \\repeat volta 2 { g'16-1 as'-2 ces''-1 as'-2 g' as' ces'' as' }\n    \\mark \\markup \\small \"b)\"\n    \\repeat volta 2 { g'16.-1 as'32-2 ces''16.-1 es''32-2 as''16.-3 es'''32-5 es'''8 }\n    \\repeat volta 2 { g'32 as'16. ces''32 es''16. as''32 es'''16. es'''8 }\n    \\repeat volta 2 { g'32-1 as' ces''-1 es'' as''-3 es'''16.-5~ es'''4 }\n  }\n  \\layout { }\n}\n\n\\score {\n  \\new Staff {\n    \\clef treble \\key es \\major \\time 6\/8\n    \\mark \\markup \\small \"c)\"\n    es''8-!-3\\f as'16( bes'-3 as'\\trill g' as' ces''-1 es''-2 as''-3 es''') r32 f'''32-3(\n    g'''8 es''') r8 r4. \\bar \"||\"\n  }\n  \\layout { ragged-right = ##t }\n}\n\n%% ==================================================================\n%%  12. THE OCTAVES OF THE STRETTO\n%% ==================================================================\n\n\\markup \\exTitle \"12.  The octaves of the stretto (mm. 30 - 32)\"\n\\markup \\justify {\n  a) The thumb alone, as legato as its sliding allows, the hand keeping\n  the span of the octave.\n  b) The upper fingers alone, the fourth on the black keys, legato.\n  c) The octaves in dotted rhythm, from the wrist, the arm carrying the\n  hand sideways.\n  d) The three leaps of m. 31, beats 3 - 4, repeated; then the whole\n  passage, where the fortissimo of m. 32 must be broad and never hard.\n}\n\n\\score {\n  \\new Staff {\n    \\clef treble \\key es \\major \\time 12\/8\n    \\mark \\markup \\small \"a)\"\n    \\repeat volta 2 {\n      ces'''8-1 bes''-1 beses''-1 as''-1 g''-1 d''-1 es''-1 es'''4.-1 f''8-1 c'''-1\n    }\n    \\break\n    \\ottava #1\n    \\mark \\markup \\small \"b)\"\n    \\repeat volta 2 {\n      ces''''8-5( bes'''-4 beses'''-5 as'''-4 g'''-5 d'''-5 es'''-4) es''''4.-5 f'''8-5 c''''-5\n    }\n    \\ottava #0\n  }\n  \\layout { }\n}\n\n\\score {\n  \\new Staff {\n    \\clef treble \\key es \\major \\time 4\/4\n    \\ottava #1\n    \\mark \\markup \\small \"c)\"\n    \\repeat volta 2 {\n      <ces''' ces''''>8. <bes'' bes'''>16 <beses'' beses'''>8. <as'' as'''>16\n      <g'' g'''>8. <d'' d'''>16 <es'' es'''>8. <es''' es''''>16\n      <es''' es''''>4 <f'' f'''>8. <c''' c''''>16 <ces''' ces''''>2\n    }\n    \\break\n    \\time 2\/4\n    \\mark \\markup \\small \"d)\"\n    \\repeat volta 2 {\n      <es'' es'''>8 <es''' es''''>-> <f'' f'''> <c''' c''''>\n    }\n    \\repeat volta 2 {\n      <es'' es'''>16 <es''' es''''>8.-> <f'' f'''>16 <c''' c''''>8.\n    }\n    \\ottava #0\n  }\n  \\layout { }\n}\n\n%% ==================================================================\n%%  13. THE CADENZA\n%% ==================================================================\n\n\\markup \\exTitle \"13.  The cell of the cadenza (mm. 33 - 35)\"\n\\markup \\justify {\n  Four neighbouring keys (A, B-flat, C-flat, C) under the fingers 1 2 3 4:\n  the difficulty is equality, not speed. Practise first an octave lower.\n  a) The accent displaced successively onto each of the four notes.\n  b) The two dotted rhythms.\n  c) The thumb held down, the other fingers light and close to the keys.\n  d) The written-out accelerando: each doubling of speed must be\n  accompanied by a lightening of the touch, so that the crescendo comes\n  from the accumulation of notes and not from pressure.\n}\n\n\\score {\n  \\new Staff {\n    \\clef treble \\key es \\major \\time 2\/4\n    \\ottava #1\n    \\mark \\markup \\small \"a)\"\n    \\repeat volta 2 { ces''''16-3-> bes'''-2 c''''-4 a'''-1 ces''''-> bes''' c'''' a''' }\n    \\repeat volta 2 { ces''''16 bes'''-> c'''' a''' ces'''' bes'''-> c'''' a''' }\n    \\repeat volta 2 { ces''''16 bes''' c''''-> a''' ces'''' bes''' c''''-> a''' }\n    \\repeat volta 2 { ces''''16 bes''' c'''' a'''-> ces'''' bes''' c'''' a'''-> }\n    \\break\n    \\mark \\markup \\small \"b)\"\n    \\repeat volta 2 { ces''''16. bes'''32 c''''16. a'''32 ces''''16. bes'''32 c''''16. a'''32 }\n    \\repeat volta 2 { ces''''32 bes'''16. c''''32 a'''16. ces''''32 bes'''16. c''''32 a'''16. }\n    \\mark \\markup \\small \"c)\"\n    \\repeat volta 2 {\n      << { ces''''16-3 bes'''-2 c''''-4 bes''' ces'''' bes''' c'''' bes''' }\n         \\\\ { a'''2-1 } >>\n    }\n    \\break\n    \\time 4\/4\n    \\mark \\markup \\small \"d)\"\n    ces''''8\\<-3 bes'''-2 c''''-4 a'''-1\n    ces''''16 bes''' c'''' a''' ces'''' bes''' c'''' a'''\n    ces''''32 bes''' c'''' a''' ces'''' bes''' c'''' a'''\n    ces''''32 bes''' c'''' a''' ces'''' bes''' c'''' a'''\\!\n    bes'''2\\fermata\n    \\bar \"||\"\n    \\ottava #0\n  }\n  \\layout { }\n}\n\n%% ==================================================================\n%%  14. THE SYNCOPATED PEDAL\n%% ==================================================================\n\n\\markup \\exTitle \"14.  The syncopated pedal (m. 1 and the beginning of m. 2)\"\n\\markup \\justify {\n  Left hand alone. The foot rises exactly with the attack of each bass and\n  goes down again immediately after, while the finger still holds the key:\n  the notation in tied sixteenths shows the instant of the change. If the\n  hand leaves the bass before the foot has come down, the bass is lost; if\n  the foot changes late, the preceding harmony is carried over. Listen to\n  each bass sounding through the whole beat.\n}\n\n\\score {\n  \\new Staff {\n    \\clef bass \\key es \\major \\time 12\/8\n    \\set Staff.pedalSustainStyle = #'bracket\n    es,16~ es,16\\sustainOn <g es'>8 <bes es' g'>\n    es16~ es16\\sustainOff\\sustainOn <as d'>8 <ces' d' as'>\n    es,16~ es,16\\sustainOff\\sustainOn <g es'>8 <bes es' g'>\n    d,16~ d,16\\sustainOff\\sustainOn <g es'>8 <bes es' g'>\n    c,16~ c,16\\sustainOff\\sustainOn <g e'>8 <bes e' g'>\n    r4.\\sustainOff r2. \\bar \"||\"\n  }\n  \\layout { ragged-right = ##t }\n}<\/code><\/pre>\n<\/details>\n\n\n\n
                                                                                                                                                GPT-6 Astra: ocho estudios bien elegidos<\/h3>\n\n\n\n
                                                                                                                                                Astra, que en las pruebas anteriores no hab\u00eda tocado una sola herramienta, esta vez se arremang\u00f3: escribi\u00f3 el fichero, lo compil\u00f3 dos veces, lo convirti\u00f3 a PDF y a im\u00e1genes, y lo revis\u00f3 visualmente buscando colisiones. Entreg\u00f3 ocho estudios en cuatro p\u00e1ginas<\/strong>, cada uno con su comp\u00e1s de origen, variantes progresivas A, B, C en recuadros y hasta su metr\u00f3nomo. Acierta bastante en qu\u00e9<\/em> dificultades elegir\u00eda Cortot, y m\u00e1s o menos en las explicaciones de c\u00f3mo trabajarlas. Sus mejores ideas: estudiar las octavas y la cadencia una octava m\u00e1s abajo, en un registro c\u00f3modo, antes de devolverlas a su sitio, y escribir las volatas con los valores duplicados antes de recuperar el ritmo original. Pero no est\u00e1 a la altura de lo de Claude: hay menos f\u00f3rmulas y menos imaginaci\u00f3n en las variantes, y las explicaciones son m\u00e1s escuetas.<\/p>\n\n\n\n
                                                                                                                                                \"Estudios
                                                                                                                                                GPT-6 Astra. P\u00e1gina 1 de 4.<\/figcaption><\/figure>\n\n\n\n
                                                                                                                                                \"Estudios
                                                                                                                                                GPT-6 Astra. P\u00e1gina 2 de 4.<\/figcaption><\/figure>\n\n\n\n
                                                                                                                                                \"Estudios
                                                                                                                                                GPT-6 Astra. P\u00e1gina 3 de 4.<\/figcaption><\/figure>\n\n\n\n
                                                                                                                                                \"Estudios
                                                                                                                                                GPT-6 Astra. P\u00e1gina 4 de 4.<\/figcaption><\/figure>\n\n\n\n
                                                                                                                                                \ud83d\udcc4 Respuesta completa de GPT-6 Astra<\/summary>\n
                                                                                                                                                I\u2019ll build progressive studies from the nocturne\u2019s actual figures, isolating the leaps, ornaments, cross-rhythms, chromatic runs and octaves before putting them back into context.<\/p>\n
                                                                                                                                                The studies will use the score\u2019s specific notes and rhythms, including the 4:3 and 8:3 figures, the runs in measures 16 and 24, and the octave passage in measure 31. I\u2019m adding preparatory variants and practice directions to each one, then checking that the LilyPond file compiles.<\/p>\n
                                                                                                                                                I\u2019m also using the PDF skill to provide a printable score alongside the editable LilyPond code and to check the notation visually.<\/p>\n
                                                                                                                                                All eight studies compile without warnings. Each has source measure references and practice directions; the two chromatic-run studies include expanded note values before returning to the original rhythm. I\u2019m checking the four-page score for notation collisions and page breaks.<\/p>\n
                                                                                                                                                Created eight original Cortot-inspired studies<\/strong>, using figures from your nocturne. Each includes practice instructions, progressive variants, and precise source references.<\/p>\n
                                                                                                                                                Download the complete LilyPond code<\/em><\/strong><\/p>\n
                                                                                                                                                Exercise<\/th>Technical focus<\/th>Source<\/th><\/tr><\/thead>
                                                                                                                                                1<\/td>Left-hand leaps and prepared landings<\/td>m. 4, beat 2; m. 29<\/td><\/tr>
                                                                                                                                                2<\/td>Singing melody over quiet accompaniment<\/td>m. 1<\/td><\/tr>
                                                                                                                                                3<\/td>Rhythmic variants and short trills<\/td>m. 5, beats 2 and 4<\/td><\/tr>
                                                                                                                                                4<\/td>Chromatic movement between hand positions<\/td>mm. 6, 14, 22<\/td><\/tr>
                                                                                                                                                5<\/td>Four-against-three and eight-against-three coordination<\/td>m. 18, beat 1; m. 29, beat 2<\/td><\/tr>
                                                                                                                                                6<\/td>Expanded and original-speed descending runs<\/td>mm. 16 and 24, beat 2<\/td><\/tr>
                                                                                                                                                7<\/td>Octave travel, release and register changes<\/td>m. 31<\/td><\/tr>
                                                                                                                                                8<\/td>Cadenza bursts and controlled descent<\/td>mm. 33\u201335<\/td><\/tr><\/tbody><\/table>\n
                                                                                                                                                The code compiles without warnings. I also visually checked the four-page printable score: :codex-file-citation{path=\u00bb[carpeta de trabajo]\/output\/pdf\/nocturne_technical_studies.pdf\u00bb purpose=\u00bboutput\u00bb}.<\/p>\n
                                                                                                                                                • \n:codex-followup[Practice schedule]{prompt=\u00bbOrganize these eight exercises into a progressive two-week practice schedule.\u00bb}\n<\/li>
                                                                                                                                                • \n:codex-followup[Additional fingerings]{prompt=\u00bbAdd suggested fingerings to the chromatic passagework exercises, explaining alternatives for smaller hands.\u00bb}\n<\/li>
                                                                                                                                                • \n:codex-followup[MIDI practice tracks]{prompt=\u00bbCreate slow MIDI practice tracks from these LilyPond exercises.\u00bb}\n<\/li><\/ul>\n<\/details>\n\n\n\n
                                                                                                                                                  \ud83d\udd27 El c\u00f3digo de los ocho estudios<\/summary>\n
                                                                                                                                                  \\version \"2.24.4\"\n\\pointAndClickOff\n\n% Original studies inspired by Cortot's analytical practice approach.\n% These are newly composed exercises, not quotations from Cortot.\n% References are to the user's supplied nocturne, excluding its pickup.\n% In that nocturne, one 12\/8 beat = one dotted quarter.\n% Exercise bar numbers restart in each score and are not source bar numbers.\n\n#(set-global-staff-size 17)\n\\paper {\n  #(set-paper-size \"a4\")\n  top-margin = 14\\mm\n  bottom-margin = 14\\mm\n  left-margin = 17\\mm\n  right-margin = 17\\mm\n  ragged-last-bottom = ##t\n  print-page-number = ##t\n  markup-system-spacing.basic-distance = #15\n  score-markup-spacing.basic-distance = #16\n}\n\\header {\n  title = \"Eight Analytical Studies for the Nocturne\"\n  subtitle = \"Original exercises inspired by Alfred Cortot's approach\"\n  composer = \"Based on the supplied E-flat major nocturne\"\n  tagline = ##f\n}\n\\layout {\n  indent = 0\n  \\context { \\Score \\override BarNumber.break-visibility = ##(#f #f #f) }\n}\n\n\\markup \\wordwrap {\n  Work slowly in short, relaxed repetitions. Each study isolates a movement,\n  varies it, then approaches the original figure. Tempos are starting points.\n  Play without pedal first; restore expressive shaping when the movement is secure.\n  Fingerings are suggestions except where explicitly taken from the source.\n}\n\n\\markup \\vspace #1\n\\markup \\bold \"1. Left-hand displacement and silent preparation\"\n\\markup \\wordwrap {\n  Source: m. 4, beat 2; m. 29, beats 1-2. A: release the bass immediately,\n  travel during the rest and touch the next chord silently before sounding it.\n  B: join the original patterns. Keep the upper chords softer than the bass;\n  move the arm instead of stretching across the distance.\n}\n\\score {\n  \\new Staff {\n    \\clef bass \\key es \\major \\time 2\/4 \\tempo 4 = 48\n    \\mark \\markup \\box \"A: prepare the landing\"\n    bes,,8-5\\p r8 <f d'>8 r8 |\n    as,,8-5 r8 <es as ces'>8 r8 | \\break\n    \\time 12\/8 \\tempo 4. = 36\n    \\mark \\markup \\box \"B: continuous motion\"\n    \\repeat unfold 4 { bes,,8 <f d'> <bes as'> } |\n    as,,8 <es as ces'> <as ces' es'>\n    <ces' es' as'> <as ces' es'> <es as ces'>\n    es, <g es'> <bes es' g'> es <g es'> <bes es' g'> |\n    \\bar \"|.\"\n  }\n}\n\n\\markup \\bold \"2. Singing over a moving accompaniment\"\n\\markup \\wordwrap {\n  Source: m. 1. A reduces the melody to its sustained outline; B restores\n  the actual rhythm. Listen through each long note while making the left hand\n  recede. Do not reattack the tied G at beat 2. After balancing without pedal,\n  change pedal with each dotted-quarter beat, listening for clean harmony.\n}\nbalanceLH = {\n  es,8\\pp <g es'> <bes es' g'> es <as d'> <ces' d' as'>\n  es, <g es'> <bes es' g'> d, <g es'> <bes es' g'> |\n}\n\\score {\n  \\new PianoStaff <<\n    \\new Staff {\n      \\clef treble \\key es \\major \\time 12\/8 \\tempo 4. = 36\n      \\mark \\markup \\box \"A: melodic outline\"\n      g''2.\\p( f''4. es''4.) | \\break\n      \\mark \\markup \\box \"B: original melody\"\n      g''4.~( g''8 f'' g'' f''4. es''4) bes'8 | \\bar \"|.\"\n    }\n    \\new Staff {\n      \\clef bass \\key es \\major \\time 12\/8\n      \\balanceLH \\balanceLH\n    }\n  >>\n}\n\n\\pageBreak\n\\markup \\bold \"3. Neighbour-note agility and the short trill\"\n\\markup \\wordwrap {\n  Source: m. 5, beats 2 and 4. Practise each line separately: long-short,\n  short-long, even notes, then the ornamented source figure. Keep the wrist\n  free and the thumb quiet. The final ornament belongs within its note's time;\n  do not add a beat. Rejoin m. 5 only after both cells are easy.\n}\n\\score {\n  \\new Staff \\relative f'' {\n    \\key es \\major \\time 3\/8 \\tempo 4. = 30\n    \\mark \\markup \\box \"A: F cell\"\n    f16.-3\\p( g32-4 f16.-3 e32-2 f16.-3 g32-4) |\n    f32( g16. f32 e16. f32 g16.) |\n    f16( g f e f g) |\n    f16( g f\\prall e f g) | \\break\n    \\mark \\markup \\box \"B: E-flat cell\"\n    es16.-3( f32-4 es16.-3 d32-2 es16.-3 f32-4) |\n    es32( f16. es32 d16. es32 f16.) |\n    es16( f es d es f) |\n    es16( f es\\prall d es f) | \\bar \"|.\"\n  }\n}\n\n\\markup \\bold \"4. Chromatic hand positions and rhythmic variants\"\n\\markup \\wordwrap {\n  Source: m. 6, beats 1-2, also mm. 14 and 22. A: learn the contour evenly.\n  B and C: redistribute time without changing pitch order. D: restore m. 6\n  over its accompaniment. Prepare each new position during the preceding\n  note; avoid turning every black-key group into an accent.\n}\n\\score {\n  \\new PianoStaff <<\n    \\new Staff \\relative g'' {\n      \\key es \\major \\time 6\/8 \\tempo 4. = 30\n      \\mark \\markup \\box \"A: even\"\n      g16\\p b, c des( c) f( e) as( g) des'( c g) |\n      \\mark \\markup \\box \"B: long-short\"\n      g16. b,32 c16. des32 c16. f32 e16. as32 g16. des'32 c16. g32 | \\break\n      \\mark \\markup \\box \"C: short-long\"\n      g32 b,16. c32 des16. c32 f16. e32 as16. g32 des'16. c32 g16. |\n      \\time 12\/8\n      \\mark \\markup \\box \"D: restore the phrase\"\n      g16\\< b, c des( c) f( e) as( g) des'( c g\n      bes4.\\!\\> as4 g8)\\! | \\bar \"|.\"\n    }\n    \\new Staff {\n      \\clef bass \\key es \\major \\time 6\/8\n      R2. | R2. | R2. | \\time 12\/8\n      c8\\pp <g e'> <bes e' g'> c <g e'> <c' e' bes'>\n      f, <f des'> <bes des' e'> f, <f c'> <as c' f'> |\n    }\n  >>\n}\n\n\\pageBreak\n\\markup \\bold \"5. Four against three; eight against three\"\n\\markup \\wordwrap {\n  Source: m. 18, beat 1; m. 29, beat 2. Each exercise bar equals ONE source\n  beat. A: four RH attacks against three LH attacks. B: eight RH attacks\n  against three LH attacks. First tap the rhythms; then play the source pitches.\n  In a 12-part grid, A uses RH 1,4,7,10 and LH 1,5,9. In a 24-part grid,\n  B uses RH 1,4,7,10,13,16,19,22 and LH 1,9,17. Finally feel one broad pulse.\n}\n\\score {\n  \\new PianoStaff <<\n    \\new Staff {\n      \\key es \\major \\time 3\/8 \\tempo 4. = 24\n      \\set tupletFullLength = ##t\n      \\override TupletNumber.text = #tuplet-number::calc-fraction-text\n      \\mark \\markup \\box \"A: four in the time of three\"\n      \\repeat unfold 2 {\n        \\times 3\/4 { es''8-3\\p( es''-2 es''-1 es''-3) } |\n      } \\break\n      \\mark \\markup \\box \"B: eight in the time of six sixteenths\"\n      \\repeat unfold 2 {\n        \\times 6\/8 { es''16\\p( f'' es'' f'' es'' f'' es'' f'') } |\n      }\n      \\bar \"|.\"\n    }\n    \\new Staff {\n      \\clef bass \\key es \\major \\time 3\/8\n      \\repeat unfold 2 { as,8\\pp <es c'> <as c' es'> | }\n      \\repeat unfold 2 { <ces' es' as'>8 <as ces' es'> <es as ces'> | }\n    }\n  >>\n}\n\n\\markup \\bold \"6. Rapid descents: expand, group, restore\"\n\\markup \\wordwrap {\n  Source: m. 16, beat 2, and m. 24, beat 2. A and C double every duration;\n  B and D restore the written values at the same dotted-quarter pulse.\n  Keep the triplets proportional. The concluding E-flat is the destination,\n  not a fresh accent. Fingerings in the m. 16 descent follow the source.\n}\n\\score {\n  \\new Staff {\n    \\key es \\major \\time 6\/8 \\tempo 4. = 26\n    \\mark \\markup \\box \"A: m. 16 expanded\"\n    \\relative c''' {\n      c16-5\\p( b-4 bes-3 a-1 as-4 f-3 d-2 ces\n      bes-2 d-3 \\tuplet 3\/2 { g16 f es-3 }) |\n    }\n    \\time 3\/8\n    \\mark \\markup \\box \"B: original values\"\n    \\relative c''' {\n      c32-5( b-4 bes-3 a-1 as-4 f-3 d-2 ces\n      bes-2 d-3 \\tuplet 3\/2 { g32 f es-3 }) |\n      es4.-2 |\n    } \\break\n    \\time 6\/8\n    \\mark \\markup \\box \"C: m. 24 expanded\"\n    \\relative bes'' {\n      bes8( a-1 as-4 \\tuplet 3\/2 { a,16 bes c }\n      cis16 d-1 \\tuplet 3\/2 { g16-5 f es }) |\n    }\n    \\time 3\/8\n    \\mark \\markup \\box \"D: original values\"\n    \\relative bes'' {\n      bes16( a-1 as-4 \\tuplet 3\/2 { a,32 bes c }\n      cis32 d-1 \\tuplet 3\/2 { g32-5 f es }) |\n      es4. |\n    }\n    \\bar \"|.\"\n  }\n}\n\n\\pageBreak\n\\markup \\bold \"7. Octave travel without a fixed wrist\"\n\\markup \\wordwrap {\n  Source: m. 31. A traces the lower-note contour one octave below the source,\n  with the thumb alone: detach gently and move the arm. B uses octaves at that\n  practice register; C restores the source register. The leap to the high\n  E-flat occurs on the second eighth of beat 3. Begin at p; add the original\n  intensity only after the travel is easy. Release between repetitions.\n}\n\\score {\n  \\new Staff {\n    \\key es \\major \\time 12\/8 \\tempo 4. = 30\n    \\mark \\markup \\box \"A: thumb route, octave lower\"\n    \\relative ces'' {\n      ces8-1\\p-. bes-1-. beses-1-. as-1-. g-1-. d-1-.\n      es-1-. es'4.-1 f,8-1-. c'-1-. |\n    } \\break\n    \\mark \\markup \\box \"B: relaxed octaves, octave lower\"\n    \\relative ces'' {\n      <ces ces'>8\\p <bes bes'> <beses beses'> <as as'> <g g'> <d d'>\n      <es es'> <es' es'>4. <f, f'>8 <c' c'> |\n    } \\break\n    \\mark \\markup \\box \"C: source register\"\n    \\ottava #1\n    \\relative ces''' {\n      <ces ces'>8\\mp <bes bes'> <beses beses'> <as as'> <g g'> <d d'>\n      <es es'> <es' es'>4.-> <f, f'>8 <c' c'> |\n    }\n    \\ottava #0 \\bar \"|.\"\n  }\n}\n\n\\markup \\bold \"8. Cadenza cell: speed, release and controlled descent\"\n\\markup \\wordwrap {\n  Source: mm. 33-35. A-C practise the four-note cell one octave below the\n  source, using its 3-2-4-1 fingering. A: spacious notes. B: brief bursts with\n  full release in the rests. C: join four cells without a new accent on each\n  thumb. D restores the source register and m. 35 descent. Gradually slow and\n  soften the descent; return to m. 36 only after the hand has released.\n}\n\\score {\n  \\new Staff {\n    \\key es \\major \\time 2\/4 \\tempo 4 = 40\n    \\ottava #1\n    \\mark \\markup \\box \"A: spacious cell\"\n    \\relative ces''' {\n      ces16-3\\p( bes-2 c-4 a-1) ces-3( bes-2 c-4 a-1) |\n    }\n    \\mark \\markup \\box \"B: bursts and release\"\n    \\relative ces''' {\n      ces32-3( bes-2 c-4 a-1) r8 ces32-3( bes-2 c-4 a-1) r8 |\n    } \\break\n    \\mark \\markup \\box \"C: continuous, supple\"\n    \\relative ces''' {\n      \\repeat unfold 4 { ces32-3( bes-2 c-4 a-1) } |\n    }\n    \\mark \\markup \\box \"D: original register and descent\"\n    \\ottava #2\n    \\relative ces'''' {\n      ces32\\p( bes d c bes a as g f d es c bes as c, d)\\pp |\n    }\n    \\ottava #0 \\bar \"|.\"\n  }\n}<\/code><\/pre>\n<\/details>\n\n\n\n
                                                                                                                                                  Gemini 3.1 Pro: cuatro ejercicios y un buen discurso<\/h3>\n\n\n\n
                                                                                                                                                  Gemini no us\u00f3 herramientas, no compil\u00f3 y entreg\u00f3 cuatro ejercicios en una p\u00e1gina<\/strong>. Su explicaci\u00f3n de los principios de Cortot es de las mejores en palabras: toques mudos para medir la topograf\u00eda del teclado, el pulgar tenido para independizar los dedos, los bloques separados por calderones en la volata. Pero en el papel se queda en lo generalista: cuatro dificultades donde los otros ven ocho y catorce, y la cadencia, que \u00e9l mismo hab\u00eda llamado \u00abla famosa cadencia Senza tempo<\/em>\u00bb en su diagn\u00f3stico, se qued\u00f3 sin ejercicio.<\/p>\n\n\n\n
                                                                                                                                                  \"Ejercicios
                                                                                                                                                  Gemini 3.1 Pro. Sus cuatro ejercicios.<\/figcaption><\/figure>\n\n\n\n
                                                                                                                                                  \ud83d\udcc4 Respuesta completa de Gemini 3.1 Pro, con su c\u00f3digo<\/summary>\n
                                                                                                                                                  To help a student conquer the specific technical challenges of Chopin’s Nocturne Op. 9 No. 2, Alfred Cortot would typically provide an \u00c9dition de travail<\/em> (Working Edition). Cortot\u2019s pedagogical philosophy heavily utilized rhythmic variations, blocking (playing broken chords simultaneously), finger independence drills (holding certain notes while articulating others), and exaggerating the difficulty to make the final performance feel effortless.<\/p>\n
                                                                                                                                                  Here is the LilyPond code containing four custom technical exercises based on the most demanding passages we identified earlier, composed strictly in Cortot’s pedagogical style:<\/p>\n
                                                                                                                                                  \\version \"2.24.4\"\n\n\\header {\n  title = \"Technical Exercises for Nocturne Op. 9 No. 2\"\n  subtitle = \"In the Style of Alfred Cortot's \u00c9ditions de Travail\"\n  composer = \" \"\n  tagline = ##f\n}\n\n\\paper {\n  markup-system-spacing.basic-distance = #15\n  system-system-spacing.basic-distance = #15\n}\n\n\\layout {\n  indent = 0\\mm\n  \\context {\n    \\Score\n    \\remove \"Bar_number_engraver\"\n  }\n}\n\n% --- EXERCISE 1 ---\n\\score {\n  \\new Staff {\n    \\clef bass\n    \\key es \\major\n    \\time 6\/8\n    \\absolute {\n      <>^\\markup { \\bold \"Exercise 1: Left-Hand Leaps and Spatial Awareness (Ref. mm. 1-2)\" }\n      ^\\markup { \\italic \"a) Play the bass note and instantly move to touch the chord silently (diamond noteheads).\" }\n      es,8[ \\once \\override NoteHead.style = #'harmonic-mixed <g es'>8 \\once \\override NoteHead.style = #'harmonic-mixed <bes es' g'>8]\n      d,8[ \\once \\override NoteHead.style = #'harmonic-mixed <g es'>8 \\once \\override NoteHead.style = #'harmonic-mixed <bes es' g'>8] | \\bar \"||\" \\break\n      \n      <>^\\markup { \\italic \"b) Rapid displacement: Play the bass note as a quick grace note to feel the arm travel.\" }\n      \\grace { es,8 } <g es'>8[ r <bes es' g'>] \\grace { d,8 } <g es'>8[ r <bes es' g'>] | \\bar \"|.\"\n    }\n  }\n}\n\n% --- EXERCISE 2 ---\n\\score {\n  \\new Staff {\n    \\clef treble\n    \\key es \\major\n    \\time 4\/4\n    \\absolute {\n      <>^\\markup { \\bold \"Exercise 2: Finger Independence for the Turn (Ref. m. 2)\" }\n      ^\\markup { \\italic \"a) Hold the thumb while articulating the upper fingers evenly. (Fingering 1-4-3-2)\" }\n      \\set fingeringOrientations = #'(up)\n      << \n        { d''16-4( c''-3 b'-2 c''-3) d''( c'' b' c'') d''( c'' b' c'') d''( c'' b' c'') } \n        \\\\ \n        { c''2-1 c''2-1 } \n      >> | \\bar \"||\" \\break\n      \n      <>^\\markup { \\italic \"b) Practice the turn with varied rhythms to gain control.\" }\n      \\time 2\/4\n      c''8-1 d''16.-4 c''32-3 b'16.-2 c''32-3 c''8-1 |\n      \\tuplet 3\/2 { c''8-1 d''-4 c''-3 } \\tuplet 3\/2 { b'8-2 c''-3 c''-1 } | \\bar \"|.\"\n    }\n  }\n}\n\n% --- EXERCISE 3 ---\n\\score {\n  \\new Staff {\n    \\clef treble\n    \\key es \\major\n    \\time 6\/8\n    \\absolute {\n      <>^\\markup { \\bold \"Exercise 3: Voicing and Legato in Double Notes (Ref. m. 12)\" }\n      ^\\markup { \\italic \"a) Play the upper voice strictly legato, and the lower notes lightly staccato to prevent tension.\" }\n      <<\n        { \\stemUp es''4.( d''8 c'' d'') }\n        \\\\\n        { \\stemDown g'4. a'8-. a'-. a'-. }\n      >> | \\bar \"||\" \\break\n      \n      <>^\\markup { \\italic \"b) Hold the upper melodic note while repeating the inner voice.\" }\n      <<\n        { \\stemUp d''4. d''4. }\n        \\\\\n        { \\stemDown a'16( g' a' g' a' g') a'( g' a' g' a' g') }\n      >> | \\bar \"|.\"\n    }\n  }\n}\n\n% --- EXERCISE 4 ---\n\\score {\n  \\new Staff {\n    \\clef treble\n    \\key es \\major\n    \\time 3\/8\n    \\absolute {\n      <>^\\markup { \\bold \"Exercise 4: Mastering the Fioritura (Ref. m. 16)\" }\n      ^\\markup { \\italic \"a) Practice with stopping points (fermatas) to organize the mind and group the hand positions.\" }\n      c'''32[-5 b''-4 bes''-3 a''-1] \\fermata as''[-4 f''-3 d''-2 ces''-1] \\fermata bes'[-2 d''-3 g''-5 f'']-4 \\fermata es''8-3 | \\bar \"||\" \\break\n      \n      <>^\\markup { \\italic \"b) Dotted rhythms for extreme articulation and brilliance.\" }\n      c'''32.[ b''64 bes''32. a''64] as''32.[ f''64 d''32. ces''64] bes'32.[ d''64 g''32. f''64] es''8 | \\bar \"|.\"\n    }\n  }\n}<\/code><\/pre>\n
                                                                                                                                                  How Cortot’s Principles are Applied Here:<\/strong><\/p>\n
                                                                                                                                                  1. \nExercise 1 (Left Hand Leaps):<\/strong> Rather than just practicing it slowly, Cortot forces the brain to internalize the physical distance. Variant 1a<\/code> uses silent touches to map the topography of the keyboard without the pressure of producing sound. Variant 1b<\/code> turns the leap into a grace note to force the arm to move instantly.\n<\/li>
                                                                                                                                                  2. \nExercise 2 (The Turn):<\/strong> A classic Cortot finger-independence drill. By physically holding down the thumb (C), the 2nd, 3rd, and 4th fingers are forced to articulate clearly without relying on wrist rotation. Rhythmic variants follow to lock in muscle memory.\n<\/li>
                                                                                                                                                  3. \nExercise 3 (Double Notes):<\/strong> To achieve a bel canto<\/em> top line, Cortot isolates the mechanics. Variant 3a<\/code> forces the student to play the melody legato while keeping the inner voice detached\u2014preventing the hand from cramping. Variant 3b<\/code> requires holding the melodic note while the inner fingers stay active.\n<\/li>
                                                                                                                                                  4. \nExercise 4 (The Fioritura):<\/strong> For massive, unmeasured runs, Cortot never suggested practicing straight through. Variant 4a<\/code> breaks the run into manageable physical \u00abblocks\u00bb separated by fermatas, allowing the mind to prepare the next hand position. Variant 4b<\/code> uses dotted rhythms to build raw finger speed and brilliance.\n<\/li><\/ol>\n<\/details>\n\n\n\n
                                                                                                                                                    La cadencia, a\u00f1o a a\u00f1o<\/h2>\n\n\n\n
                                                                                                                                                    Si hay un pasaje para medir todo esto es la cadencia ad libitum<\/em> de los compases 33 a 35: cuatro notas vecinas, Do bemol, Si bemol, Do y La, repetidas a toda velocidad. En 2024 Claude no la detect\u00f3, tuve que preguntarle expresamente, y contest\u00f3 esto:<\/p>\n\n\n\n
                                                                                                                                                    \"Ejercicio
                                                                                                                                                    2024. Claude 3.5, tras preguntarle expresamente por la cadencia.<\/figcaption><\/figure>\n\n\n\n
                                                                                                                                                    Con las notas equivocadas, para empezar: se le olvid\u00f3 el bemol del Do. Aquel d\u00eda cerr\u00e9 la entrada con esta frase:<\/p>\n\n\n\n
                                                                                                                                                    \n
                                                                                                                                                    Aunque, la inteligencia de Cortot para proponer el ejercicio para este pasaje no la encontramos en el modelo de lenguaje, por ahora…<\/p>\n<\/blockquote>\n\n\n\n
                                                                                                                                                    En 2025 ya la incluy\u00f3 sin que nadie se lo pidiera, y con las notas bien. Pero f\u00edjate en las variantes A, C y D: \u00abtempo regular\u00bb, \u00abaceleraci\u00f3n gradual\u00bb y \u00abdesaceleraci\u00f3n gradual\u00bb son, sobre el papel, exactamente la misma m\u00fasica con distinto t\u00edtulo. El estudio est\u00e1 en el r\u00f3tulo, no en la f\u00f3rmula:<\/p>\n\n\n\n
                                                                                                                                                    \"Ejercicio
                                                                                                                                                    2025. Claude: \u00abThe Famous Cadenza\u00bb, sin preguntarle.<\/figcaption><\/figure>\n\n\n\n
                                                                                                                                                    En 2026, Claude y Astra la traen de serie. Mira el ejercicio 13 de Claude, al final de su quinta p\u00e1gina: \u00abCuatro teclas vecinas bajo los dedos 1 2 3 4: la dificultad es la igualdad, no la velocidad<\/strong>\u00bb. Estudiar primero una octava m\u00e1s abajo; el acento desplazado sucesivamente a cada una de las cuatro notas; los dos ritmos con puntillo; el pulgar tenido con los dem\u00e1s dedos ligeros y pegados a la tecla; y un accelerando escrito, de corcheas a fusas, donde \u00abcada duplicaci\u00f3n de la velocidad debe ir acompa\u00f1ada de un aligeramiento del toque, de modo que el crescendo venga de la acumulaci\u00f3n de notas y no de la presi\u00f3n\u00bb. Eso ya no es repetir un fragmento. Eso es entender por qu\u00e9 el pasaje es dif\u00edcil.<\/p>\n\n\n\n
                                                                                                                                                    A Gemini, como en 2024 a Claude, hubo que pregunt\u00e1rselo con el prompt de entonces. Y contest\u00f3 bien: acentos desplazados, ritmos con puntillo, staccato seco desde el nudillo, y una idea fina que no se les ocurri\u00f3 a los otros, tocar la c\u00e9lula de cuatro notas en tresillos para que el acento vaya cayendo solo en un dedo distinto cada vez. L\u00e1stima de maquetaci\u00f3n, con los textos montados unos sobre otros y cortados por el margen: lo que pasa cuando no miras lo que entregas.<\/p>\n\n\n\n
                                                                                                                                                    \"Ejercicio
                                                                                                                                                    2026. Gemini 3.1 Pro, tras preguntarle por la cadencia.<\/figcaption><\/figure>\n\n\n\n
                                                                                                                                                    \ud83d\udcc4 Respuesta completa de Gemini 3.1 Pro sobre la cadencia, con su c\u00f3digo<\/summary>\n
                                                                                                                                                    In measures 33, 34, and 35, there is an ad libitum cadence with notes that can be played very quickly. What exercise in the style of Alfred Cortot would you write in Lilypond code to work on the clear articulation of each note in the groups?<\/code><\/pre>\n\n\n\n
                                                                                                                                                    To master the rapid, undulating Senza tempo<\/em> cadenza in measures 33-35, Alfred Cortot\u2019s approach focuses on combatting the hand’s natural tendency to \u00abroll\u00bb or blur repeating patterns. To achieve crystal-clear articulation, the brain must be forced to actively command every single finger independently.<\/p>\n
                                                                                                                                                    Cortot achieved this through shifting accents<\/strong>, metric displacement<\/strong> (forcing a 4-note pattern into a 3-note rhythm), and extreme rhythmic variations<\/strong>.<\/p>\n
                                                                                                                                                    Here is a LilyPond exercise block written in Cortot’s exact pedagogical style to build absolute clarity and finger independence for this specific cadenza (fingering: 3 on C-flat, 2 on B-flat, 4 on C-natural, 1 on A-natural):<\/p>\n
                                                                                                                                                    \\version \"2.24.4\"\n\n\\header {\n  title = \"Technical Exercises for Nocturne Op. 9 No. 2\"\n  subtitle = \"Mastering the Cadenza (Measures 33-35)\"\n  composer = \" \"\n  tagline = ##f\n}\n\n\\paper {\n  markup-system-spacing.basic-distance = #15\n  system-system-spacing.basic-distance = #15\n}\n\n\\layout {\n  indent = 0\\mm\n  \\context {\n    \\Score\n    \\remove \"Bar_number_engraver\"\n  }\n}\n\n\\score {\n  \\new Staff {\n    \\clef treble\n    \\key es \\major\n    \\absolute {\n      <>^\\markup { \\bold \"Exercise 5: Clear Articulation for the Cadenza (Ref. mm. 33-35)\" }\n      ^\\markup { \\italic \"a) Shifting Accents: Accent a different finger on each repetition to equalize finger strength.\" }\n      \\time 4\/4\n      ces''16->-3( bes'-2 c''-4 a'-1) ces''16-3( bes'->-2 c''-4 a'-1) ces''16-3( bes'-2 c''->-4 a'-1) ces''16-3( bes'-2 c''-4 a'->-1) | \\bar \"||\" \\break\n      \n      <>^\\markup { \\italic \"b) Metric Displacement: Play the 4-note pattern as triplets. The accent naturally shifts to a new finger.\" }\n      \\time 12\/8\n      ces''8->-3( bes'-2 c''-4) a'->-1( ces''-3 bes'-2) c''->-4( a'-1 ces''-3) bes'->-2( c''-4 a'-1) | \\bar \"||\" \\break\n\n      <>^\\markup { \\italic \"c) Rhythmic Variants: Use dotted rhythms for 'snap' and extreme clarity.\" }\n      \\time 2\/4\n      ces''16.-3( bes'32-2 c''16.-4 a'32-1) ces''32-3( bes'16.-2 c''32-4 a'16.-1) | \\bar \"||\" \\break\n      \n      <>^\\markup { \\italic \"d) Articulation: Play very slowly with a strong, dry staccato (from the knuckle, without pedal).\" }\n      \\time 2\/4\n      ces''16-.-3 bes'-.-2 c''-.-4 a'-.-1 ces''16-. bes'-. c''-. a'-. | \\bar \"|.\"\n    }\n  }\n}<\/code><\/pre>\n
                                                                                                                                                    Why these exercises work (The Cortot Method):<\/strong><\/p>\n
                                                                                                                                                    • \nVariant A (Shifting Accents):<\/strong> When playing fast, the thumb (1) and middle finger (3) naturally dominate. By forcing the accent onto the 2nd and 4th fingers on subsequent beats, you build equality across the hand.\n<\/li>
                                                                                                                                                    • \nVariant B (Metric Displacement):<\/strong> This was one of Cortot’s favorite tricks. By putting a 4-note physical pattern into a 3-note musical meter (triplets), the strong beat automatically rotates through the fingers. On beat 1, finger 3<\/strong> is accented. On beat 2, finger 1<\/strong>. On beat 3, finger 4<\/strong>. On beat 4, finger 2<\/strong>. \n<\/li>
                                                                                                                                                    • \nVariant C (Dotted Rhythms):<\/strong> This builds fast-twitch muscle reflexes. It teaches the fingers to fire instantly and then relax, creating the \u00abpearl-like\u00bb brilliance Chopin requires.\n<\/li>
                                                                                                                                                    • \nVariant D (Staccato):<\/strong> Playing a legato passage heavily staccato removes the crutch of the wrist and pedal, forcing the knuckle joints to do 100% of the mechanical work. When you return to playing it legato and fast, it will feel incredibly light and articulate.\n<\/li><\/ul>\n<\/details>\n\n\n\n
                                                                                                                                                      Tres a\u00f1os en una tabla<\/h2>\n\n\n\n
                                                                                                                                                      <\/th>Diagn\u00f3stico<\/th>Inventa cosas<\/th>Ejercicios<\/th>Forma<\/th>La cadencia<\/th>Revisa lo que entrega<\/th><\/tr><\/thead>
                                                                                                                                                      2024 \u00b7 Claude 3.5<\/td>Gen\u00e9rico; concreto solo al insistir<\/td>S\u00ed: una polirritmia que no existe<\/td>Pocos; repetir fragmentos<\/td>Pentagramas sueltos<\/td>Solo al preguntar, y con notas err\u00f3neas<\/td>No<\/td><\/tr>
                                                                                                                                                      2024 \u00b7 GPT-4o<\/td>Gen\u00e9rico; consejos que no salen de la partitura<\/td>S\u00ed<\/td>El c\u00f3digo no compila<\/td>No se puede ver<\/td>No<\/td>No<\/td><\/tr>
                                                                                                                                                      2025 \u00b7 Claude<\/td>Concreto, con ejemplos<\/td>Poco<\/td>8, con mucho texto<\/td>Prosa a lo Cortot<\/td>S\u00ed, por iniciativa propia<\/td>No<\/td><\/tr>
                                                                                                                                                      2026 \u00b7 Claude Fable 5.1<\/td>Minucioso, con comp\u00e1s y tiempo<\/td>No he encontrado nada<\/td>14, en 6 p\u00e1ginas<\/td>Texto y f\u00f3rmulas con letra, como Cortot<\/td>S\u00ed, de serie<\/td>S\u00ed, tres rondas<\/td><\/tr>
                                                                                                                                                      2026 \u00b7 GPT-6 Astra<\/td>Ordenado y concreto<\/td>No he encontrado nada<\/td>8, en 4 p\u00e1ginas<\/td>Variantes A, B, C con su fuente<\/td>S\u00ed, de serie<\/td>S\u00ed<\/td><\/tr>
                                                                                                                                                      2026 \u00b7 Gemini 3.1 Pro<\/td>Correcto, m\u00e1s escolar<\/td>Un recuento mal hecho<\/td>4, en 1 p\u00e1gina<\/td>Ejercicios con instrucciones<\/td>Solo al preguntar; bien resuelta<\/td>No<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
                                                                                                                                                      Lo que me llevo<\/h2>\n\n\n\n
                                                                                                                                                      El \u00abpor ahora\u00bb ha caducado.<\/strong> En 2024 escrib\u00ed que la inteligencia de Cortot no estaba en el modelo de lenguaje, por ahora. No voy a decir que Claude sea Cortot. Pero el ejercicio 13 razona como razona un buen profesor: identifica cu\u00e1l<\/em> es la dificultad real, que no es la que parece, y dise\u00f1a el estudio a partir de ah\u00ed. Hace dos a\u00f1os eso no estaba. Hoy est\u00e1.<\/p>\n\n\n\n
                                                                                                                                                      Del consejo que vale para todo al comp\u00e1s y tiempo.<\/strong> Lo que en 2024 hab\u00eda que arrancar con un segundo prompt, y sal\u00eda trufado de inventos, hoy llega a la primera y resiste la comprobaci\u00f3n. Con la cautela que ya he confesado: esta vez la precisi\u00f3n la ped\u00ed yo de entrada.<\/p>\n\n\n\n
                                                                                                                                                      Otra vez, el que mira lo que entrega gana.<\/strong> Tercera entrada y tercera vez que sale lo mismo. Claude compil\u00f3, mir\u00f3 sus seis p\u00e1ginas y corrigi\u00f3 hasta quedar conforme. Astra, que nunca usaba herramientas, esta vez compil\u00f3 y revis\u00f3, y su resultado subi\u00f3. Gemini no mir\u00f3 nada, y entreg\u00f3 menos, y con los textos pis\u00e1ndose.<\/p>\n\n\n\n
                                                                                                                                                      La sombra de la memoria.<\/strong> Dos de los tres reconocieron la obra, y Claude hasta me corrigi\u00f3 el tempo con la indicaci\u00f3n original de Chopin. \u00bfCu\u00e1nto de estos diagn\u00f3sticos es lectura del c\u00f3digo, y cu\u00e1nto es recuerdo de todo lo que se ha escrito sobre el nocturno m\u00e1s famoso del mundo, edici\u00f3n de Cortot incluida? No lo s\u00e9. Por eso el siguiente paso natural es repetir el carril con los tres nocturnos que ellos mismos inventaron en la entrada anterior: sobre una pieza que no exist\u00eda ayer no hay memoria que valga.<\/p>\n\n\n\n
                                                                                                                                                      Y el profesor, \u00bfqu\u00e9?<\/strong> Para escribir esta entrada he tenido que saber si trece notas eran trece, si una digitaci\u00f3n se puede tocar y si un ejercicio se parece a Cortot o solo lo nombra. La herramienta ya da material de estudio serio, y eso a un alumno de Profesional le puede ahorrar horas de estudio mal planteado. Pero alguien tiene que saber distinguir los catorce ejercicios de Claude de los cuatro de Gemini. Ese alguien seguimos siendo nosotros.<\/p>\n\n\n\n
                                                                                                                                                      La cautela de siempre: una ejecuci\u00f3n por modelo, familias y generaciones distintas, y un \u00fanico juez, que soy yo.<\/p>\n\n\n\n
                                                                                                                                                      Lo que viene<\/h2>\n\n\n\n
                                                                                                                                                      El carril sobre los nocturnos inventados, para quitarle la red de la memoria. La prueba de reconocimiento en gradiente: la misma obra limpia, transportada, con una sola mano, y sin ninguna indicaci\u00f3n. Y las erratas: cinco notas falsas escondidas en el nocturno, a ver qui\u00e9n las encuentra.<\/p>\n\n\n\n
                                                                                                                                                      T\u00f3cala, componla, est\u00fadiala\u2026 Si esto sigue as\u00ed, el d\u00eda menos pensado les pido que suban al escenario. Ah\u00ed ya veremos.<\/em><\/p>\n\n\n\n
                                                                                                                                                      \n
                                                                                                                                                      Transparencia.<\/strong> Este borrador lo ha redactado Claude Fable 5.1 (Anthropic) a partir del registro de la prueba, y yo lo he revisado. El conflicto de intereses es m\u00e1ximo: es uno de los tres examinados y el que sale mejor parado. Por eso la valoraci\u00f3n de los ejercicios es m\u00eda, como pianista y profesor; las respuestas de los modelos se reproducen \u00edntegras y sin tocar, salvo las rutas de carpetas de mi ordenador, que he sustituido por \u00ab[carpeta de trabajo]\u00bb; y las comprobaciones contra la partitura est\u00e1n hechas sobre el c\u00f3digo.<\/p>\n<\/blockquote>\n\n\n\n
                                                                                                                                                      Si esta entrada te ha parecido interesante:<\/p>\n\n\n\n
                                                                                                                                                      <\/div><\/p>\n","protected":false},"excerpt":{"rendered":"
                                                                                                                                                      Tercera prueba del Chopin-Cortot Benchmark: tres IA diagnostican las dificultades del Nocturno op. 9 n.\u00ba 2 y escriben ejercicios a la manera de Alfred Cortot. Comparado con 2024 y 2025, y con una frase m\u00eda de entonces que toca retirar.<\/p>\n","protected":false},"author":1,"featured_media":881,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[1],"tags":[16,12,9],"class_list":["post-893","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-codigo-musical","tag-inteligencia-artificial","tag-pedagogia"],"jetpack_publicize_connections":[],"jetpack-related-posts":[{"id":300,"url":"https:\/\/elpulpoenelvaso.jlmirall.es\/?p=300","url_meta":{"origin":893,"position":0},"title":"La Inteligencia Artificial de Modelos Extensos de Lenguaje (LLM – Claude y GPT) y su capacidad para crear partituras y t\u00e9cnicas de estudio en Lilypond","author":"admin","date":"octubre 28, 2024","format":false,"excerpt":"En esta entrada comprobamos la capacidad de Claude y GPT para escribir partituras (usando c\u00f3digo Lilhpond) y su capacidad para entender pedag\u00f3gicamente aquello que ha escrito.","rel":"","context":"En \u00abC\u00f3digo Musical\u00bb","block_context":{"text":"C\u00f3digo Musical","link":"https:\/\/elpulpoenelvaso.jlmirall.es\/?tag=codigo-musical"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2024\/10\/DALL%C2%B7E-2024-10-19-17.34.42-A-similar-portrait-of-Frederic-Chopin-as-a-cyborg-set-in-a-nocturnal-scene.-The-emphasis-is-on-a-blend-of-traditional-music-composition-and-modern-te.jpg?fit=1024%2C1024&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2024\/10\/DALL%C2%B7E-2024-10-19-17.34.42-A-similar-portrait-of-Frederic-Chopin-as-a-cyborg-set-in-a-nocturnal-scene.-The-emphasis-is-on-a-blend-of-traditional-music-composition-and-modern-te.jpg?fit=1024%2C1024&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2024\/10\/DALL%C2%B7E-2024-10-19-17.34.42-A-similar-portrait-of-Frederic-Chopin-as-a-cyborg-set-in-a-nocturnal-scene.-The-emphasis-is-on-a-blend-of-traditional-music-composition-and-modern-te.jpg?fit=1024%2C1024&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2024\/10\/DALL%C2%B7E-2024-10-19-17.34.42-A-similar-portrait-of-Frederic-Chopin-as-a-cyborg-set-in-a-nocturnal-scene.-The-emphasis-is-on-a-blend-of-traditional-music-composition-and-modern-te.jpg?fit=1024%2C1024&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":850,"url":"https:\/\/elpulpoenelvaso.jlmirall.es\/?p=850","url_meta":{"origin":893,"position":1},"title":"T\u00f3cala otra vez, IA","author":"admin","date":"septiembre 17, 2026","format":false,"excerpt":"Primera prueba del Chopin-Cortot Benchmark: GPT-6 Astra, Claude Fable 5.1 y Gemini 3.1 Pro escriben de memoria el inicio del Nocturno op. 9 n.\u00ba 2. Dos juegan limpio. El tercero busca la partitura en internet y luego dice que la escribi\u00f3 de memoria.","rel":"","context":"En \u00abC\u00f3digo Musical\u00bb","block_context":{"text":"C\u00f3digo Musical","link":"https:\/\/elpulpoenelvaso.jlmirall.es\/?tag=codigo-musical"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2026\/09\/chopin-cortot-1-casablanca-gemini.png?fit=1137%2C825&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2026\/09\/chopin-cortot-1-casablanca-gemini.png?fit=1137%2C825&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2026\/09\/chopin-cortot-1-casablanca-gemini.png?fit=1137%2C825&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2026\/09\/chopin-cortot-1-casablanca-gemini.png?fit=1137%2C825&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2026\/09\/chopin-cortot-1-casablanca-gemini.png?fit=1137%2C825&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":871,"url":"https:\/\/elpulpoenelvaso.jlmirall.es\/?p=871","url_meta":{"origin":893,"position":2},"title":"Componla otra vez, IA","author":"admin","date":"septiembre 17, 2026","format":false,"excerpt":"Segunda prueba del Chopin-Cortot Benchmark: tres IA componen un nocturno a lo Chopin, y lo comparo con los que les ped\u00ed en 2024 y 2025. Tres a\u00f1os de nocturnos artificiales tocados por el mismo piano, y un violonchelo que nadie hab\u00eda invitado.","rel":"","context":"En \u00abC\u00f3digo Musical\u00bb","block_context":{"text":"C\u00f3digo Musical","link":"https:\/\/elpulpoenelvaso.jlmirall.es\/?tag=codigo-musical"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2026\/09\/componla-2026-fable.png?fit=1100%2C1200&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2026\/09\/componla-2026-fable.png?fit=1100%2C1200&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2026\/09\/componla-2026-fable.png?fit=1100%2C1200&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2026\/09\/componla-2026-fable.png?fit=1100%2C1200&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2026\/09\/componla-2026-fable.png?fit=1100%2C1200&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":288,"url":"https:\/\/elpulpoenelvaso.jlmirall.es\/?p=288","url_meta":{"origin":893,"position":3},"title":"ChopIAn: Sus nocturnos seg\u00fan la IA","author":"admin","date":"octubre 21, 2024","format":false,"excerpt":"Hicimos una prueba con 6 inteligencias artificiales de audio para crear nocturnos de Chopin, \u00a1pero tambi\u00e9n en versi\u00f3n Rock, Bach, Raga y \u00d3pera!","rel":"","context":"En \u00abAudio\u00bb","block_context":{"text":"Audio","link":"https:\/\/elpulpoenelvaso.jlmirall.es\/?tag=audio"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2024\/10\/7F719B95-80C7-4E94-9A2F-3797A5B5B0F8.jpg?fit=1024%2C1024&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2024\/10\/7F719B95-80C7-4E94-9A2F-3797A5B5B0F8.jpg?fit=1024%2C1024&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2024\/10\/7F719B95-80C7-4E94-9A2F-3797A5B5B0F8.jpg?fit=1024%2C1024&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2024\/10\/7F719B95-80C7-4E94-9A2F-3797A5B5B0F8.jpg?fit=1024%2C1024&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":582,"url":"https:\/\/elpulpoenelvaso.jlmirall.es\/?p=582","url_meta":{"origin":893,"position":4},"title":"ChopIAn II: ahora con Lyria de Google","author":"admin","date":"febrero 21, 2026","format":false,"excerpt":"En esta entrada retomo mi experimento con modelos de IA de generaci\u00f3n de audio intentando crear nocturnos al estilo de Chopin, varias mezclas de estilos e introduzco nuevas pruebas que un alumno de primeros cursos de conservatorio podr\u00eda resolver. \u00bfLo har\u00e1 la IA?","rel":"","context":"En \u00abAudio\u00bb","block_context":{"text":"Audio","link":"https:\/\/elpulpoenelvaso.jlmirall.es\/?tag=audio"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2026\/02\/Captura-de-pantalla-2026-02-21-a-las-16.19.57.png?fit=1200%2C1072&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2026\/02\/Captura-de-pantalla-2026-02-21-a-las-16.19.57.png?fit=1200%2C1072&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2026\/02\/Captura-de-pantalla-2026-02-21-a-las-16.19.57.png?fit=1200%2C1072&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2026\/02\/Captura-de-pantalla-2026-02-21-a-las-16.19.57.png?fit=1200%2C1072&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2026\/02\/Captura-de-pantalla-2026-02-21-a-las-16.19.57.png?fit=1200%2C1072&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":397,"url":"https:\/\/elpulpoenelvaso.jlmirall.es\/?p=397","url_meta":{"origin":893,"position":5},"title":"Evaluaci\u00f3n asistida por IA en 3 pasos de trabajos escritos","author":"admin","date":"noviembre 28, 2024","format":false,"excerpt":"En esta entrada voy a presentar una idea de como se puede implementar una evaluaci\u00f3n de tareas de redacci\u00f3n o preguntas a desarrollar de un examen (es decir, texto principalmente) asistida por Inteligencia Artificial. N\u00f3tese que hablamos de evaluaci\u00f3n \u201casistida\u201d por IA, y no de evaluaci\u00f3n \u201crealizada\u201d por IA. Vamos\u2026","rel":"","context":"En \u00abDise\u00f1o Instruccional\u00bb","block_context":{"text":"Dise\u00f1o Instruccional","link":"https:\/\/elpulpoenelvaso.jlmirall.es\/?tag=diseno-instruccional"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2024\/11\/DALL%C2%B7E-2024-11-28-12.12.51-Vista-cenital-de-un-escritorio-con-una-redaccion-escrita-en-papel-siendo-evaluada-por-un-visor-de-inteligencia-artificial.-En-el-visor-aparecen-icono.jpg?fit=1024%2C1024&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2024\/11\/DALL%C2%B7E-2024-11-28-12.12.51-Vista-cenital-de-un-escritorio-con-una-redaccion-escrita-en-papel-siendo-evaluada-por-un-visor-de-inteligencia-artificial.-En-el-visor-aparecen-icono.jpg?fit=1024%2C1024&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2024\/11\/DALL%C2%B7E-2024-11-28-12.12.51-Vista-cenital-de-un-escritorio-con-una-redaccion-escrita-en-papel-siendo-evaluada-por-un-visor-de-inteligencia-artificial.-En-el-visor-aparecen-icono.jpg?fit=1024%2C1024&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2024\/11\/DALL%C2%B7E-2024-11-28-12.12.51-Vista-cenital-de-un-escritorio-con-una-redaccion-escrita-en-papel-siendo-evaluada-por-un-visor-de-inteligencia-artificial.-En-el-visor-aparecen-icono.jpg?fit=1024%2C1024&ssl=1&resize=700%2C400 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/i0.wp.com\/elpulpoenelvaso.jlmirall.es\/wp-content\/uploads\/2026\/09\/estudiala-ex-fable-p1.png?fit=921%2C1327&ssl=1","_links":{"self":[{"href":"https:\/\/elpulpoenelvaso.jlmirall.es\/index.php?rest_route=\/wp\/v2\/posts\/893","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/elpulpoenelvaso.jlmirall.es\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/elpulpoenelvaso.jlmirall.es\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/elpulpoenelvaso.jlmirall.es\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/elpulpoenelvaso.jlmirall.es\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=893"}],"version-history":[{"count":1,"href":"https:\/\/elpulpoenelvaso.jlmirall.es\/index.php?rest_route=\/wp\/v2\/posts\/893\/revisions"}],"predecessor-version":[{"id":894,"href":"https:\/\/elpulpoenelvaso.jlmirall.es\/index.php?rest_route=\/wp\/v2\/posts\/893\/revisions\/894"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/elpulpoenelvaso.jlmirall.es\/index.php?rest_route=\/wp\/v2\/media\/881"}],"wp:attachment":[{"href":"https:\/\/elpulpoenelvaso.jlmirall.es\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=893"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/elpulpoenelvaso.jlmirall.es\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=893"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/elpulpoenelvaso.jlmirall.es\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=893"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}