| {"generated_note":"Curated public subset of jam-actions-v0 (CC-BY-SA-3.0). One opening phrase per piece.","dataset":"https://huggingface.co/datasets/mcp-tool-shop/jam-actions-v0","examples":[{"id":"clair-de-lune:m001-004:piano:mcp-session:v1","song_id":"clair-de-lune","title":"Clair de Lune (Suite bergamasque, III)","composer":"Claude Debussy","year":1905,"key":"Db major","tempo_bpm":100,"time_signature":"9/8","phrase_window":"measures 1-4","phrase_label":"opening atmosphere — introductory phrase","split":"test","attribution":{"arranger":"Bernd Krueger","license":"CC-BY-SA-3.0","source":"http://piano-midi.de/"},"notes":[{"t":0.3,"d":2.4,"n":65,"v":36,"h":"R"},{"t":0.3,"d":2.4,"n":68,"v":43,"h":"R"},{"t":0.6,"d":1.2,"n":77,"v":36,"h":"R"},{"t":0.6,"d":1.2,"n":80,"v":43,"h":"R"},{"t":1.8,"d":1.2,"n":73,"v":33,"h":"R"},{"t":1.8,"d":1.2,"n":77,"v":39,"h":"R"},{"t":2.7,"d":2.7,"n":66,"v":30,"h":"R"},{"t":2.7,"d":2.7,"n":69,"v":36,"h":"R"},{"t":3,"d":0.3,"n":72,"v":31,"h":"R"},{"t":3,"d":0.3,"n":75,"v":37,"h":"R"},{"t":3.3,"d":0.3,"n":73,"v":27,"h":"R"},{"t":3.3,"d":0.3,"n":77,"v":32,"h":"R"},{"t":3.6,"d":2.1,"n":72,"v":25,"h":"R"},{"t":3.6,"d":2.1,"n":75,"v":30,"h":"R"},{"t":5.4,"d":2.7,"n":65,"v":33,"h":"R"},{"t":5.4,"d":2.7,"n":68,"v":39,"h":"R"},{"t":5.7,"d":0.3,"n":70,"v":34,"h":"R"},{"t":5.7,"d":0.3,"n":73,"v":40,"h":"R"},{"t":6,"d":0.3,"n":72,"v":28,"h":"R"},{"t":6,"d":0.3,"n":75,"v":34,"h":"R"},{"t":6.3,"d":2.1,"n":70,"v":27,"h":"R"},{"t":6.3,"d":0.45,"n":73,"v":32,"h":"R"},{"t":6.75,"d":0.9,"n":77,"v":46,"h":"R"},{"t":7.65,"d":0.75,"n":73,"v":45,"h":"R"},{"t":8.1,"d":2.7,"n":63,"v":32,"h":"R"},{"t":8.1,"d":2.695,"n":66,"v":38,"h":"R"},{"t":8.4,"d":0.3,"n":68,"v":28,"h":"R"},{"t":8.4,"d":0.3,"n":72,"v":34,"h":"R"},{"t":8.7,"d":0.3,"n":70,"v":26,"h":"R"},{"t":8.7,"d":0.3,"n":73,"v":31,"h":"R"},{"t":9,"d":2.1,"n":68,"v":22,"h":"R"},{"t":9,"d":2.1,"n":72,"v":27,"h":"R"}],"annotation":{"structure":"Opening atmospheric introduction — 9/8 ripple, floating long melody notes","key_moments":["m1 opening chord with sustained melody","m3 harmonic color shift","m4 transitional chord — expectation"],"teaching_goals":["9/8 triplet pulse must feel like three big beats, not nine","tone color: muted and distant, as if through fog","half-pedal technique for shimmer without muddiness"],"style_tips":["ppp — barely touching the keys","slow and floating — resist the urge to rush","pedal creates the atmospheric shimmer"]},"trace":{"objective":"Read mm. 1–4 of Clair de Lune (Suite bergamasque, III), view the piano roll, analyze the phrase, play in a loop, and predict the continuation.","session":[{"turn":1,"role":"user","content":"Show me measures 1–4 of Clair de Lune and describe the opening atmosphere."},{"turn":2,"role":"assistant","content":"Let me view the piano roll for mm. 1–4.","calls":["view_piano_roll"]},{"turn":3,"role":"tool","tool":"view_piano_roll","result":{"svg_returned":true,"measures":4,"rh_notes":32,"lh_notes":0}},{"turn":4,"role":"assistant","content":"Clair de Lune opens in 9/8 with a hauntingly slow, floating quality. Measures 1–4 introduce the atmospheric texture: the melody moves in long notes over a rippling accompaniment. The triplet feel creates a sense of moonlight on water. Let me loop mm. 1–4.","calls":["play_song"]},{"turn":5,"role":"tool","tool":"play_song","result":{"playback_started":true,"mode":"loop"}},{"turn":6,"role":"assistant","content":"Clair de Lune mm. 1–4: opening atmospheric phrase, 9/8 triplet texture, floating quality. Db major. Teaching focus: tone color, pedal use for shimmer."}]}},{"id":"fur-elise:m001-008:piano:mcp-session:v1","song_id":"fur-elise","title":"Fur Elise (Bagatelle No. 25 in A minor)","composer":"Ludwig van Beethoven","year":1810,"key":"A minor","tempo_bpm":69,"time_signature":"3/8","phrase_window":"measures 1-8","phrase_label":"complete A-theme opening","split":"train","attribution":{"arranger":"Bernd Krueger","license":"CC-BY-SA-3.0","source":"http://piano-midi.de/"},"notes":[{"t":0.8673,"d":0.2168,"n":76,"v":36,"h":"R"},{"t":1.0841,"d":0.2168,"n":75,"v":33,"h":"R"},{"t":1.301,"d":0.2168,"n":76,"v":39,"h":"R"},{"t":1.5178,"d":0.2168,"n":75,"v":36,"h":"R"},{"t":1.7346,"d":0.2168,"n":76,"v":45,"h":"R"},{"t":1.9514,"d":0.2168,"n":71,"v":40,"h":"R"},{"t":2.1683,"d":0.2168,"n":74,"v":47,"h":"R"},{"t":2.3851,"d":0.2168,"n":72,"v":39,"h":"R"},{"t":2.6019,"d":0.2168,"n":45,"v":37,"h":"L"},{"t":2.6019,"d":0.4337,"n":69,"v":51,"h":"R"},{"t":2.8187,"d":0.2168,"n":52,"v":33,"h":"L"},{"t":3.0356,"d":0.2168,"n":57,"v":33,"h":"L"},{"t":3.2524,"d":0.2168,"n":60,"v":34,"h":"R"},{"t":3.4692,"d":0.2168,"n":64,"v":38,"h":"R"},{"t":3.686,"d":0.2168,"n":69,"v":42,"h":"R"},{"t":3.9029,"d":0.2168,"n":40,"v":40,"h":"L"},{"t":3.9029,"d":0.4337,"n":71,"v":46,"h":"R"},{"t":4.1197,"d":0.2168,"n":52,"v":33,"h":"L"},{"t":4.3365,"d":0.2168,"n":56,"v":34,"h":"L"},{"t":4.5533,"d":0.2168,"n":64,"v":36,"h":"R"},{"t":4.7702,"d":0.2168,"n":68,"v":39,"h":"R"},{"t":4.987,"d":0.2168,"n":71,"v":42,"h":"R"},{"t":5.2038,"d":0.2168,"n":45,"v":38,"h":"L"},{"t":5.2038,"d":0.4337,"n":72,"v":45,"h":"R"},{"t":5.4206,"d":0.2168,"n":52,"v":35,"h":"L"},{"t":5.6375,"d":0.2168,"n":57,"v":35,"h":"L"},{"t":5.8543,"d":0.2168,"n":64,"v":35,"h":"R"},{"t":6.0711,"d":0.2168,"n":76,"v":38,"h":"R"},{"t":6.2879,"d":0.2168,"n":75,"v":34,"h":"R"},{"t":6.5048,"d":0.2168,"n":76,"v":41,"h":"R"},{"t":6.7216,"d":0.2168,"n":75,"v":37,"h":"R"},{"t":6.9384,"d":0.2168,"n":76,"v":46,"h":"R"},{"t":7.1552,"d":0.2168,"n":71,"v":39,"h":"R"},{"t":7.3721,"d":0.2168,"n":74,"v":48,"h":"R"},{"t":7.5889,"d":0.2168,"n":72,"v":39,"h":"R"},{"t":7.8057,"d":0.2168,"n":45,"v":36,"h":"L"},{"t":7.8057,"d":0.4337,"n":69,"v":48,"h":"R"},{"t":8.0226,"d":0.2168,"n":52,"v":35,"h":"L"},{"t":8.2394,"d":0.2168,"n":57,"v":34,"h":"L"},{"t":8.4562,"d":0.2168,"n":60,"v":34,"h":"R"},{"t":8.673,"d":0.2168,"n":64,"v":37,"h":"R"},{"t":8.8899,"d":0.2168,"n":69,"v":41,"h":"R"},{"t":9.1067,"d":0.2168,"n":40,"v":38,"h":"L"},{"t":9.1067,"d":0.4337,"n":71,"v":45,"h":"R"},{"t":9.3235,"d":0.2168,"n":52,"v":35,"h":"L"},{"t":9.5403,"d":0.2168,"n":56,"v":36,"h":"L"},{"t":9.7572,"d":0.2168,"n":64,"v":37,"h":"R"},{"t":9.974,"d":0.2168,"n":72,"v":40,"h":"R"},{"t":10.1908,"d":0.2168,"n":71,"v":38,"h":"R"}],"annotation":{"structure":"A-theme opening, oscillating E-D# neighbor motion resolving to A","key_moments":["m1 RH neighbor figure","m4 cadence to E","m5 restatement"],"teaching_goals":["evenness of RH oscillation","voice independence","phrasing across cadence"],"style_tips":["light cantabile touch","do not rush the oscillation"]},"trace":{"objective":"Read mm. 1–8 of Für Elise, view the piano roll, analyze the opening figure, play the phrase in a loop, then produce a phrase annotation.","session":[{"turn":1,"role":"user","content":"Read measures 1–8 of Für Elise and tell me what's happening musically before we play it."},{"turn":2,"role":"assistant","content":"Let me view the piano roll for mm. 1–8.","calls":["view_piano_roll"]},{"turn":3,"role":"tool","tool":"view_piano_roll","result":{"svg_returned":true,"measures":8,"rh_notes":34,"lh_notes":15}},{"turn":4,"role":"assistant","content":"I can see the opening oscillation: RH alternates E5 and D#5 over an A-minor bassline. The motion is metric and quiet — it's the A-theme entrance. The phrase resolves at m. 4 with a half cadence to E, then restates from m. 5. Let me loop mm. 1–8 so you can hear the phrasing.","calls":["play_song"]},{"turn":5,"role":"tool","tool":"play_song","result":{"playback_started":true,"mode":"loop"}},{"turn":6,"role":"assistant","content":"Phrase summary — Für Elise mm. 1–8: A-theme opening. Oscillating E–D# neighbor motion in RH over A-minor bassline. Half cadence at m. 4, restated from m. 5. Teaching focus: evenness of RH oscillation, voice independence, light cantabile touch."}]}},{"id":"bach-prelude-c-major-bwv846:m001-004:piano:mcp-session:v1","song_id":"bach-prelude-c-major-bwv846","title":"Prelude in C Major, BWV 846 (Well-Tempered Clavier)","composer":"Johann Sebastian Bach","year":1722,"key":"C major","tempo_bpm":74,"time_signature":"4/4","phrase_window":"measures 1-4","phrase_label":"opening four-chord cycle","split":"train","attribution":{"arranger":"Bernd Krueger","license":"CC-BY-SA-3.0","source":"http://piano-midi.de/"},"notes":[{"t":0.0017,"d":1.6216,"n":60,"v":61,"h":"R"},{"t":0.2044,"d":1.4189,"n":64,"v":57,"h":"R"},{"t":0.4071,"d":0.2027,"n":67,"v":56,"h":"R"},{"t":0.6098,"d":0.2027,"n":72,"v":60,"h":"R"},{"t":0.8125,"d":0.1824,"n":76,"v":63,"h":"R"},{"t":1.0152,"d":0.2027,"n":67,"v":50,"h":"R"},{"t":1.2179,"d":0.2027,"n":72,"v":47,"h":"R"},{"t":1.4206,"d":0.2027,"n":76,"v":47,"h":"R"},{"t":1.6233,"d":1.6216,"n":60,"v":62,"h":"R"},{"t":1.826,"d":1.4189,"n":64,"v":57,"h":"R"},{"t":2.0287,"d":0.2027,"n":67,"v":56,"h":"R"},{"t":2.2314,"d":0.2027,"n":72,"v":60,"h":"R"},{"t":2.4341,"d":0.1824,"n":76,"v":62,"h":"R"},{"t":2.6368,"d":0.2027,"n":67,"v":50,"h":"R"},{"t":2.8395,"d":0.2027,"n":72,"v":48,"h":"R"},{"t":3.0422,"d":0.2027,"n":76,"v":48,"h":"R"},{"t":3.2449,"d":1.6216,"n":60,"v":65,"h":"R"},{"t":3.4476,"d":1.4189,"n":62,"v":60,"h":"R"},{"t":3.6503,"d":0.2027,"n":69,"v":56,"h":"R"},{"t":3.853,"d":0.2027,"n":74,"v":60,"h":"R"},{"t":4.0557,"d":0.1824,"n":77,"v":65,"h":"R"},{"t":4.2584,"d":0.2027,"n":69,"v":51,"h":"R"},{"t":4.4611,"d":0.2027,"n":74,"v":50,"h":"R"},{"t":4.6639,"d":0.2027,"n":77,"v":50,"h":"R"},{"t":4.8666,"d":1.6216,"n":60,"v":65,"h":"R"},{"t":5.0693,"d":1.4189,"n":62,"v":60,"h":"R"},{"t":5.272,"d":0.2027,"n":69,"v":58,"h":"R"},{"t":5.4747,"d":0.2027,"n":74,"v":60,"h":"R"},{"t":5.6774,"d":0.1824,"n":77,"v":65,"h":"R"},{"t":5.8801,"d":0.2027,"n":69,"v":52,"h":"R"},{"t":6.0828,"d":0.2027,"n":74,"v":50,"h":"R"},{"t":6.2855,"d":0.2027,"n":77,"v":50,"h":"R"},{"t":6.4882,"d":1.6216,"n":59,"v":65,"h":"L"},{"t":6.6909,"d":1.4189,"n":62,"v":60,"h":"R"},{"t":6.8936,"d":0.2027,"n":67,"v":56,"h":"R"},{"t":7.0963,"d":0.2027,"n":74,"v":60,"h":"R"},{"t":7.299,"d":0.1824,"n":77,"v":65,"h":"R"},{"t":7.5017,"d":0.2027,"n":67,"v":51,"h":"R"},{"t":7.7044,"d":0.2027,"n":74,"v":50,"h":"R"},{"t":7.9071,"d":0.2027,"n":77,"v":50,"h":"R"},{"t":8.1098,"d":1.6216,"n":59,"v":65,"h":"L"},{"t":8.3125,"d":1.4189,"n":62,"v":60,"h":"R"},{"t":8.5152,"d":0.2027,"n":67,"v":56,"h":"R"},{"t":8.7179,"d":0.2027,"n":74,"v":60,"h":"R"},{"t":8.9206,"d":0.1824,"n":77,"v":65,"h":"R"},{"t":9.1233,"d":0.2027,"n":67,"v":52,"h":"R"},{"t":9.326,"d":0.2027,"n":74,"v":50,"h":"R"},{"t":9.5287,"d":0.2027,"n":77,"v":50,"h":"R"},{"t":9.7314,"d":1.6216,"n":60,"v":61,"h":"R"},{"t":9.9341,"d":1.4189,"n":64,"v":57,"h":"R"},{"t":10.1368,"d":0.2027,"n":67,"v":53,"h":"R"},{"t":10.3395,"d":0.2027,"n":72,"v":55,"h":"R"},{"t":10.5422,"d":0.1824,"n":76,"v":60,"h":"R"},{"t":10.7449,"d":0.2027,"n":67,"v":50,"h":"R"},{"t":10.9476,"d":0.2027,"n":72,"v":47,"h":"R"},{"t":11.1503,"d":0.2027,"n":76,"v":47,"h":"R"},{"t":11.353,"d":1.6216,"n":60,"v":62,"h":"R"},{"t":11.5557,"d":1.4189,"n":64,"v":57,"h":"R"},{"t":11.7584,"d":0.2027,"n":67,"v":55,"h":"R"},{"t":11.9611,"d":0.2027,"n":72,"v":57,"h":"R"},{"t":12.1639,"d":0.1824,"n":76,"v":61,"h":"R"},{"t":12.3666,"d":0.2027,"n":67,"v":50,"h":"R"},{"t":12.5693,"d":0.2027,"n":72,"v":48,"h":"R"},{"t":12.772,"d":0.2027,"n":76,"v":48,"h":"R"}],"annotation":{"structure":"Opening arpeggiated pattern — four-measure harmonic template establishing the prelude's texture (C – Dm7/C – G7/B – C)","key_moments":["m1 C major arpeggio — tonic statement (C-E-G pattern)","m2 Dm7 over the C bass — the prelude's first gentle dissonance","m3 G7 over B — dominant pull, bass steps down","m4 C major — home again, the cycle is complete"],"teaching_goals":["perfectly even rhythm across all 16th-note arpeggios","harmonic awareness within repeating patterns","smooth voice-leading as chords change"],"style_tips":["equal weight on every note — no accent on beat 1","let the harmonic changes do the phrasing","minimal rubato — the flow is the beauty"]},"trace":{"objective":"Read mm. 1–4 of the Bach C Major Prelude, view the piano roll, analyze the arpeggiated harmonic pattern, play the phrase in a loop, then produce a phrase annotation.","session":[{"turn":1,"role":"user","content":"Read measures 1–4 of the Bach C Major Prelude and describe what's happening musically."},{"turn":2,"role":"assistant","content":"Let me view the piano roll for mm. 1–4.","calls":["view_piano_roll"]},{"turn":3,"role":"tool","tool":"view_piano_roll","result":{"svg_returned":true,"measures":4,"rh_notes":62,"lh_notes":2}},{"turn":4,"role":"assistant","content":"The prelude opens with a flowing arpeggiated texture — each measure is a single chord broken into 16th notes. I can see four distinct chord shapes: m.1 C major (C-E-G), m.2 D minor seventh over the same C bass (C-D-F-A), m.3 G7 over B (B-D-F-G), m.4 C major again. Tonic, gentle dissonance, dominant, home — with a harmonic rhythm of exactly one chord per measure. Let me loop mm. 1–4 so you can hear the pattern.","calls":["play_song"]},{"turn":5,"role":"tool","tool":"play_song","result":{"playback_started":true,"mode":"loop"}},{"turn":6,"role":"assistant","content":"Phrase summary — Bach C Major Prelude mm. 1–4: arpeggiated opening template. Four measures, four chords (C, Dm7/C, G7/B, C). Teaching focus: even 16th-note rhythm, harmonic awareness within the arpeggio pattern, smooth legato through chord changes."}]}},{"id":"chopin-nocturne-op9-no2:m001-004:piano:mcp-session:v1","song_id":"chopin-nocturne-op9-no2","title":"Nocturne in Eb Major, Op. 9 No. 2","composer":"Frederic Chopin","year":1832,"key":"Eb major","tempo_bpm":120,"time_signature":"4/4","phrase_window":"measures 1-4","phrase_label":"opening antecedent — theme statement","split":"train","attribution":{"arranger":"Bernd Krueger","license":"CC-BY-SA-3.0","source":"http://piano-midi.de/"},"notes":[{"t":0,"d":0.8313,"n":70,"v":46,"h":"R"},{"t":0.7729,"d":2.5313,"n":79,"v":81,"h":"R"},{"t":0.7875,"d":0.2854,"n":39,"v":24,"h":"L"},{"t":1.5021,"d":0.1583,"n":55,"v":31,"h":"L"},{"t":1.5042,"d":0.2,"n":63,"v":25,"h":"R"},{"t":2.0167,"d":0.15,"n":67,"v":29,"h":"R"},{"t":2.0208,"d":0.3167,"n":58,"v":19,"h":"L"},{"t":2.0271,"d":0.1708,"n":63,"v":34,"h":"R"},{"t":2.5833,"d":0.2604,"n":51,"v":40,"h":"L"},{"t":3.1708,"d":0.5958,"n":77,"v":78,"h":"R"},{"t":3.2042,"d":0.1375,"n":56,"v":23,"h":"L"},{"t":3.225,"d":0.1042,"n":62,"v":27,"h":"R"},{"t":3.6479,"d":0.7229,"n":79,"v":94,"h":"R"},{"t":3.6688,"d":0.0917,"n":68,"v":33,"h":"R"},{"t":3.6781,"d":0.0896,"n":59,"v":24,"h":"L"},{"t":3.6844,"d":0.0792,"n":62,"v":9,"h":"R"},{"t":4.2375,"d":1.825,"n":77,"v":79,"h":"R"},{"t":4.2667,"d":0.2333,"n":39,"v":36,"h":"L"},{"t":4.8937,"d":0.1396,"n":63,"v":33,"h":"R"},{"t":4.9208,"d":0.1125,"n":55,"v":22,"h":"L"},{"t":5.4146,"d":0.1979,"n":58,"v":20,"h":"L"},{"t":5.4271,"d":0.1,"n":67,"v":28,"h":"R"},{"t":5.4375,"d":0.0792,"n":63,"v":24,"h":"R"},{"t":5.8917,"d":0.7188,"n":75,"v":42,"h":"R"},{"t":5.9188,"d":0.2646,"n":38,"v":50,"h":"L"},{"t":6.5292,"d":0.1542,"n":63,"v":35,"h":"R"},{"t":6.5333,"d":0.1938,"n":55,"v":31,"h":"L"},{"t":7.0021,"d":0.6354,"n":70,"v":65,"h":"R"},{"t":7.0292,"d":0.1729,"n":58,"v":22,"h":"L"},{"t":7.0292,"d":0.0646,"n":67,"v":35,"h":"R"},{"t":7.05,"d":0.0896,"n":63,"v":39,"h":"R"},{"t":7.5458,"d":0.2854,"n":36,"v":59,"h":"L"},{"t":7.551,"d":0.9573,"n":79,"v":84,"h":"R"}],"annotation":{"structure":"Antecedent phrase — Eb major opening theme, ends on dominant","key_moments":["m1 Eb cantabile theme entrance","m2 ascending melodic peak","m4 half cadence on Bb dominant"],"teaching_goals":["singing cantabile RH touch","LH-RH independence — LH always quieter","phrase shape: rise and fall"],"style_tips":["RH melody sings as if a soprano voice","LH broken chords are breath, not beats","no hurrying the ascent"]},"trace":{"objective":"Read mm. 1–4 of Nocturne in Eb Major, Op. 9 No. 2, view the piano roll, analyze the phrase, play in a loop, and predict the continuation.","session":[{"turn":1,"role":"user","content":"Show me measures 1–4 of the Chopin Nocturne Op. 9 No. 2 and explain the opening melody."},{"turn":2,"role":"assistant","content":"Let me view the piano roll for mm. 1–4.","calls":["view_piano_roll"]},{"turn":3,"role":"tool","tool":"view_piano_roll","result":{"svg_returned":true,"measures":4,"rh_notes":20,"lh_notes":13}},{"turn":4,"role":"assistant","content":"The nocturne opens with Chopin's iconic cantabile melody in Eb major. Measures 1–4 form the antecedent: the melody ascends from Eb, reaches a peak around G5/Ab5, then rests on Bb — the dominant — creating an open-ended feeling. The LH broken-chord accompaniment is quiet and steady. Let me loop mm. 1–4.","calls":["play_song"]},{"turn":5,"role":"tool","tool":"play_song","result":{"playback_started":true,"mode":"loop"}},{"turn":6,"role":"assistant","content":"Chopin Nocturne mm. 1–4: antecedent phrase, Eb major. Melody peaks then rests on dominant Bb. LH broken chords support. Teaching focus: cantabile RH touch, LH-RH independence."}]}},{"id":"mozart-k545-mvt1:m001-004:piano:mcp-session:v1","song_id":"mozart-k545-mvt1","title":"Piano Sonata No. 16 in C Major, K. 545, I. Allegro","composer":"Wolfgang Amadeus Mozart","year":1788,"key":"C major","tempo_bpm":137,"time_signature":"4/4","phrase_window":"measures 1-4","phrase_label":"opening theme antecedent","split":"train","attribution":{"arranger":"Bernd Krueger","license":"CC-BY-SA-3.0","source":"http://piano-midi.de/"},"notes":[{"t":0,"d":0.2197,"n":60,"v":40,"h":"R"},{"t":0,"d":0.8789,"n":72,"v":60,"h":"R"},{"t":0.2197,"d":0.2197,"n":67,"v":30,"h":"R"},{"t":0.4394,"d":0.2197,"n":64,"v":30,"h":"R"},{"t":0.6591,"d":0.2197,"n":67,"v":30,"h":"R"},{"t":0.8789,"d":0.2197,"n":60,"v":40,"h":"R"},{"t":0.8789,"d":0.4394,"n":76,"v":60,"h":"R"},{"t":1.0986,"d":0.2197,"n":67,"v":30,"h":"R"},{"t":1.3183,"d":0.2197,"n":64,"v":30,"h":"R"},{"t":1.3183,"d":0.4394,"n":79,"v":60,"h":"R"},{"t":1.538,"d":0.2197,"n":67,"v":30,"h":"R"},{"t":1.7577,"d":0.2197,"n":62,"v":30,"h":"R"},{"t":1.7577,"d":0.6591,"n":71,"v":60,"h":"R"},{"t":1.9774,"d":0.2197,"n":67,"v":29,"h":"R"},{"t":2.1972,"d":0.2197,"n":65,"v":31,"h":"R"},{"t":2.4169,"d":0.2197,"n":67,"v":28,"h":"R"},{"t":2.4169,"d":0.1099,"n":72,"v":55,"h":"R"},{"t":2.5267,"d":0.1099,"n":74,"v":51,"h":"R"},{"t":2.6366,"d":0.2197,"n":60,"v":40,"h":"R"},{"t":2.6366,"d":0.4394,"n":72,"v":60,"h":"R"},{"t":2.8563,"d":0.2197,"n":67,"v":29,"h":"R"},{"t":3.076,"d":0.2197,"n":64,"v":32,"h":"R"},{"t":3.2957,"d":0.2197,"n":67,"v":29,"h":"R"},{"t":3.5155,"d":0.2197,"n":60,"v":40,"h":"R"},{"t":3.5155,"d":0.8789,"n":81,"v":64,"h":"R"},{"t":3.7352,"d":0.2197,"n":69,"v":32,"h":"R"},{"t":3.9549,"d":0.2197,"n":65,"v":32,"h":"R"},{"t":4.1746,"d":0.2197,"n":69,"v":32,"h":"R"},{"t":4.3943,"d":0.2197,"n":60,"v":40,"h":"R"},{"t":4.3943,"d":0.4394,"n":79,"v":62,"h":"R"},{"t":4.614,"d":0.2197,"n":67,"v":32,"h":"R"},{"t":4.8337,"d":0.2197,"n":64,"v":32,"h":"R"},{"t":4.8337,"d":0.4394,"n":84,"v":64,"h":"R"},{"t":5.0535,"d":0.2197,"n":67,"v":32,"h":"R"},{"t":5.2732,"d":0.2197,"n":59,"v":40,"h":"L"},{"t":5.2732,"d":0.4394,"n":79,"v":64,"h":"R"},{"t":5.4929,"d":0.2197,"n":67,"v":32,"h":"R"},{"t":5.7126,"d":0.2197,"n":62,"v":32,"h":"R"},{"t":5.7126,"d":0.0732,"n":77,"v":55,"h":"R"},{"t":5.7858,"d":0.0732,"n":79,"v":55,"h":"R"},{"t":5.8591,"d":0.0732,"n":77,"v":55,"h":"R"},{"t":5.9323,"d":0.2197,"n":67,"v":32,"h":"R"},{"t":5.9323,"d":0.1099,"n":76,"v":59,"h":"R"},{"t":6.0422,"d":0.1099,"n":77,"v":55,"h":"R"},{"t":6.152,"d":0.2197,"n":60,"v":40,"h":"R"},{"t":6.152,"d":0.4394,"n":76,"v":60,"h":"R"},{"t":6.3718,"d":0.2197,"n":67,"v":34,"h":"R"},{"t":6.5915,"d":0.2197,"n":64,"v":34,"h":"R"},{"t":6.8112,"d":0.2197,"n":67,"v":34,"h":"R"}],"annotation":{"structure":"Opening theme — ascending C major scale statement (m.1) followed by melodic response over Alberti bass (mm. 2–4)","key_moments":["m1 iconic ascending scale C5→C6 — tonic statement","m2 melodic E5→B4 descent over Alberti bass (G-C-E pattern)","m3 D5 peak — subdominant coloring","m4 half cadence on G — phrase closes on dominant, prepares repeat"],"teaching_goals":["sonata form first-theme identification","Alberti bass pattern evenness (LH C-G-E-G-C-G-E-G)","Classical-era touch and articulation — clean, vocal phrasing"],"style_tips":["clean even articulation — no pedal abuse","Alberti bass light and even — never louder than melody","phrasing should be elegant and vocal, not percussive"]},"trace":{"objective":"Read mm. 1–4 of Mozart K545 Movement 1, view the piano roll, analyze the opening theme, play the phrase in a loop, then produce a phrase annotation.","session":[{"turn":1,"role":"user","content":"Read measures 1–4 of Mozart's K545 first movement and explain what's happening musically."},{"turn":2,"role":"assistant","content":"Let me view the piano roll for mm. 1–4.","calls":["view_piano_roll"]},{"turn":3,"role":"tool","tool":"view_piano_roll","result":{"svg_returned":true,"measures":4,"rh_notes":48,"lh_notes":1}},{"turn":4,"role":"assistant","content":"The opening is immediately recognizable: m.1 has an ascending C major scale from C5 to C6 in the RH, while the LH begins its characteristic Alberti bass (alternating C-G-E-G pattern). Mm. 2–4 develop the melody downward with E5→D5→B4, closing on a half cadence at m.4 on the dominant G. The texture is completely transparent — thin Classical style, melody over harmonic support. Let me loop mm. 1–4 so you can hear the phrase shape.","calls":["play_song"]},{"turn":5,"role":"tool","tool":"play_song","result":{"playback_started":true,"mode":"loop"}},{"turn":6,"role":"assistant","content":"Phrase summary — Mozart K545 mm. 1–4: opening theme, C major. Ascending scale m.1 + melodic descent mm. 2–4 over Alberti bass. Half cadence at m.4. Teaching focus: Alberti bass evenness, Classical articulation, vocal phrasing."}]}},{"id":"pathetique-mvt2:m001-004:piano:mcp-session:v1","song_id":"pathetique-mvt2","title":"Pathetique Sonata, 2nd Movement (Adagio cantabile)","composer":"Ludwig van Beethoven","year":1799,"key":"Ab major","tempo_bpm":120,"time_signature":"4/4","phrase_window":"measures 1-4","phrase_label":"Adagio cantabile opening antecedent — sparse RH theme over rocking LH arpeggio","split":"train","attribution":{"arranger":"Bernd Krueger","license":"CC-BY-SA-3.0","source":"http://piano-midi.de/"},"notes":[{"t":1.999,"d":2.35,"n":60,"v":63,"h":"R"},{"t":2.0094,"d":2.2854,"n":44,"v":25,"h":"L"},{"t":2.0635,"d":0.6708,"n":56,"v":17,"h":"L"},{"t":2.649,"d":0.5521,"n":51,"v":23,"h":"L"},{"t":3.149,"d":0.5417,"n":56,"v":19,"h":"L"},{"t":3.5948,"d":0.5375,"n":51,"v":23,"h":"L"},{"t":4.0385,"d":2.1792,"n":58,"v":56,"h":"L"},{"t":4.0719,"d":2.0562,"n":49,"v":27,"h":"L"},{"t":4.1073,"d":0.4521,"n":55,"v":18,"h":"L"},{"t":4.5219,"d":0.5021,"n":51,"v":21,"h":"L"},{"t":5.0115,"d":0.5542,"n":55,"v":23,"h":"L"},{"t":5.4885,"d":0.7604,"n":51,"v":26,"h":"L"},{"t":5.9677,"d":3.0146,"n":63,"v":60,"h":"R"},{"t":6.0115,"d":0.6521,"n":56,"v":22,"h":"L"},{"t":6.0302,"d":2.0417,"n":48,"v":20,"h":"L"},{"t":6.5365,"d":0.5854,"n":51,"v":26,"h":"L"},{"t":7.0135,"d":0.6188,"n":56,"v":28,"h":"L"},{"t":7.5427,"d":0.5917,"n":51,"v":20,"h":"L"}],"annotation":{"structure":"Opening antecedent of the Adagio cantabile (paired continuation at m. 5–8). The right hand is exceptionally sparse — only two pitches sound across the four bars (C4 at m. 1 b3.9979 and D#4 at m. 3 b3.9354, both at the very end of their measures as upbeat-pickup leads into the next bar). The harmonic and rhythmic engine lives in the left hand: 16 LH events forming a slow rocking arpeggio that outlines the A♭ major tonic and its V (E♭, MIDI-spelled D#) across mm. 2–4. The LH pattern alternates A♭ (G#2, G#3, MIDI naming) with E♭ (D#3) and brief chromatic-color tones (A#3, C#3, G3, C3). The dominant pitch class throughout is D# (E♭) — it is the V of A♭ major and recurs 7 times across the phrase, anchoring the harmonic field.","key_moments":["m. 1 b3.9979 — C4 entrance in the right hand (MIDI velocity 63, sustained 2.35 seconds across the bar line into m. 2). This is the only right-hand event in measure 1; the entire bar otherwise rests. The C4 pickup leads into the LH arpeggio that begins at m. 2 b0.0188 with G#2 (A♭2) on the bass downbeat","m. 2 — LH rocking arpeggio entry: G#2 (A♭2) bass at b0.0188, G#3 (A♭3) inner voice at b0.1271, then D#3 (E♭3) at b1.2979 marks the first dominant-tone arrival, G#3 again at b2.2979, D#3 again at b3.1896; the surface is six LH attacks across the bar (the densest LH measure of the phrase)","m. 3 — chromatic-color cluster: LH attacks A#3 (B♭3, the seventh) at b0.0771, C#3 (D♭3, lowered ♮IV color) at b0.1438, G3 (the leading tone of A♭) at b0.2146, then D#3 at b1.0438, G3 at b2.0229, D#3 at b2.9771. The right hand re-enters with D#4 (E♭4) at b3.9354 — the second and final RH pickup, sustained 3.01 seconds (longest RH duration of the phrase)","m. 4 — closing LH arpeggio: G#3 at b0.0229, C3 (low tonic) at b0.0604 (sustained 2.04 seconds — the longest single LH bass note), D#3 at b1.0729, G#3 at b2.0271, D#3 at b3.0854. The phrase ends with the LH still rocking, the RH silent — the opening sound is suspension, not arrival","hand balance: the left hand plays 16 notes across the phrase; the right hand plays 2. The LH dominates this opening texture by a wide margin — the cantabile melody is implied by the C4 / D#4 pickup pair, not stated in full"],"teaching_goals":["treat the LH rocking arpeggio as the main musical content of this phrase — it carries the harmony, the rhythm, and the registral motion while the RH is sparse","voice each RH pickup (C4 at m. 1 b3.9979 and D#4 at m. 3 b3.9354) as a singing upbeat that bridges into the next bar — sustain its tone through the LH activity below","feel the recurring D#3 (E♭3) attacks as the dominant pole of A♭ major; the bar-by-bar rocking returns to E♭ as the gravitational center","release the LH C3 in m. 4 b0.0604 only when its 2.04-second sustain naturally ends — it is the harmonic floor for the entire closing bar"],"style_tips":["pp to mp throughout — extremely soft, contemplative; never loud enough to break the dreamlike opening","pedal each LH chord change (m. 2, m. 3, m. 4) — half-pedal through the inner-voice activity to keep the rocking arpeggio clear without smearing the chromatic-color tones","Adagio means very slow — the RH C4 should ring 2+ seconds before the LH bass arrives at m. 2; do not rush the pickup"]},"trace":{"objective":"Read mm. 1–4 of Pathetique Sonata, 2nd Movement (Adagio cantabile), view the piano roll, analyze the phrase, play in a loop, and predict the continuation.","session":[{"turn":1,"role":"user","content":"Show me measures 1–4 of Beethoven's Pathetique Sonata second movement and explain the singing theme."},{"turn":2,"role":"assistant","content":"Let me view the piano roll for mm. 1–4.","calls":["view_piano_roll"]},{"turn":3,"role":"tool","tool":"view_piano_roll","result":{"svg_returned":true,"measures":4,"rh_notes":2,"lh_notes":16}},{"turn":4,"role":"assistant","content":"The Adagio cantabile opens with one of Beethoven's most beautiful melodies in Ab major. Measures 1–4 present the antecedent: a long, singing RH melody over a rocking LH arpeggio pattern. The mood is peaceful and contemplative. The phrase ends on the dominant Eb — expectant. Let me loop mm. 1–4.","calls":["play_song"]},{"turn":5,"role":"tool","tool":"play_song","result":{"playback_started":true,"mode":"loop"}},{"turn":6,"role":"assistant","content":"Pathetique mvt 2 mm. 1–4: Adagio cantabile opening, Ab major singing melody over LH arpeggios. Ends on dominant Eb. Teaching focus: sustained singing tone, LH rocking pattern."}]}},{"id":"schumann-traumerei:m001-004:piano:mcp-session:v1","song_id":"schumann-traumerei","title":"Traumerei (Dreaming) from Kinderszenen","composer":"Robert Schumann","year":1838,"key":"F major","tempo_bpm":120,"time_signature":"4/4","phrase_window":"measures 1-4","phrase_label":"Träumerei opening antecedent — pickup C4 into F major dreaming theme","split":"train","attribution":{"arranger":"Bernd Krueger","license":"CC-BY-SA-3.0","source":"http://piano-midi.de/"},"notes":[{"t":1.125,"d":0.3646,"n":60,"v":48,"h":"R"},{"t":2,"d":1.8281,"n":65,"v":57,"h":"R"},{"t":2.026,"d":0.2708,"n":41,"v":30,"h":"L"},{"t":2.974,"d":1.75,"n":48,"v":29,"h":"L"},{"t":2.974,"d":0.7969,"n":60,"v":30,"h":"R"},{"t":2.9948,"d":1.75,"n":57,"v":22,"h":"L"},{"t":3.0104,"d":0.6354,"n":53,"v":24,"h":"L"},{"t":4.5208,"d":0.5781,"n":64,"v":56,"h":"R"},{"t":5.1042,"d":0.4375,"n":65,"v":63,"h":"R"},{"t":5.5417,"d":0.3594,"n":69,"v":73,"h":"R"},{"t":5.9323,"d":0.2083,"n":72,"v":82,"h":"R"},{"t":6.349,"d":0.276,"n":77,"v":83,"h":"R"},{"t":6.5521,"d":0.1563,"n":46,"v":52,"h":"L"},{"t":6.7031,"d":0.1198,"n":53,"v":37,"h":"L"},{"t":7.0365,"d":1.5208,"n":77,"v":73,"h":"R"},{"t":7.0573,"d":1.224,"n":62,"v":57,"h":"R"},{"t":7.0729,"d":2.2813,"n":65,"v":44,"h":"R"}],"annotation":{"structure":"Opening antecedent of Träumerei (paired continuation at m. 5–8). The phrase begins with a single right-hand C4 pickup at m. 1 b2.25 — the only event in measure 1, the dominant tone of F major sounded as a soft anacrusis. From m. 2 onward, the texture fills out: F4 enters in the right hand on the downbeat (m. 2 b0, the only event in the entire phrase that lands exactly on beat 1), supported by an F2 bass on b0.0521 and a C3+A3+F3 LH chord at b1.95-2.02. The melody rises through m. 3 (E4, F4, A4, C5) and climaxes at F5 in m. 4 b0.6979 — the highest right-hand pitch of the phrase, the famous opening sigh. The window stays in F major throughout with only one chromatic touch (A#2 / B♭2 at m. 4 b1.1042 — the lowered seventh, the subdominant-color tone). Pitch class F dominates the phrase, sounding 8 times across the four bars in alternating registers.","key_moments":["m. 1 b2.25 — C4 right-hand pickup (the only event in measure 1, MIDI velocity 48, sustained 0.36 seconds). This is the dominant tone of F major sounded as the soft anacrusis that gives Träumerei its dreamlike opening character. The entire bar is otherwise silent — no LH, no other RH event","m. 2 b0 — F4 right-hand downbeat (the only event in the phrase whose beat field equals exactly 0). The F4 is sustained 1.83 seconds (longest RH event in m. 2) over a stacked LH chord: F2 at b0.0521, then a three-note inner cluster C3 / A3 / F3 entering at b1.95-2.02 with the second RH C4 at b1.9479","m. 3 — ascending melodic line: E4 at b1.0417, F4 at b2.2083, A4 at b3.0833, C5 at b3.8646 (sustained only 0.21 seconds — the shortest RH note). Each step rises in velocity (56 → 63 → 73 → 82) preparing the F5 climax in m. 4","m. 4 b0.6979 — F5 climax (the highest right-hand pitch of the phrase, MIDI velocity 83, sustained 0.28 seconds). Below it, A#2 (B♭2) appears at b1.1042 — the only chromatic non-F-major pitch in the window, the subdominant-color seventh. A second F5 follows at b2.0729 (the closing F that holds 1.52 seconds, the longest RH event in m. 4) with D4 + F4 stacking below it for the final F-major chord that suspends through the phrase end","hand balance: the right hand plays 11 notes — including both Fs in m. 4 (the climax pair) — and the left hand plays 6, mostly inner-voice cluster support. The melody lives in the RH; the LH provides harmonic anchor"],"teaching_goals":["voice the C4 pickup at m. 1 b2.25 as the dreaming entrance — the whole piece flows out of this single soft tone","shape the m. 3 ascent E4 → F4 → A4 → C5 as one rising breath, not four notes; each step grows in velocity (the MIDI velocities go 56 → 63 → 73 → 82) and prepares the F5 climax","voice the F5 climax at m. 4 b0.6979 as the phrase's high point — the sigh; do not strike it, let it bloom out of the rising line","respect the long F5 sustain at m. 4 b2.0729 (1.52 seconds) as the suspended close — the phrase ends still hanging on F, not resolved","the single chromatic tone A#2 (B♭2) at m. 4 b1.1042 is the only color note in the window; voice it as the subdominant-touch under the F5 climax"],"style_tips":["pp throughout — the entire phrase lives at the dynamic floor; the F5 climax only rises to mp at most","pedal generously through the rising line in m. 3 — the legato connection is the dream's character","no rush on the C4 pickup; let it hang a full beat before the F4 downbeat enters at m. 2 b0"]},"trace":{"objective":"Read mm. 1–4 of Traumerei (Dreaming) from Kinderszenen, view the piano roll, analyze the phrase, play in a loop, and predict the continuation.","session":[{"turn":1,"role":"user","content":"Show me measures 1–4 of Schumann's Traumerei and describe the intimate character."},{"turn":2,"role":"assistant","content":"Let me view the piano roll for mm. 1–4.","calls":["view_piano_roll"]},{"turn":3,"role":"tool","tool":"view_piano_roll","result":{"svg_returned":true,"measures":4,"rh_notes":11,"lh_notes":6}},{"turn":4,"role":"assistant","content":"Traumerei (Dreaming) is the most intimate of Schumann's Kinderszenen. Measures 1–4 present the antecedent: a singing RH melody over a rich, full LH chord texture. The harmony wanders romantically away from F major before resolving. Let me loop mm. 1–4.","calls":["play_song"]},{"turn":5,"role":"tool","tool":"play_song","result":{"playback_started":true,"mode":"loop"}},{"turn":6,"role":"assistant","content":"Schumann Traumerei mm. 1–4: opening antecedent, F major, singing melody over rich harmonies. Romantic character. Teaching focus: warm tone, full chord voicing."}]}},{"id":"chopin-prelude-e-minor:m001-004:piano:mcp-session:v1","song_id":"chopin-prelude-e-minor","title":"Prelude in E Minor, Op. 28 No. 4","composer":"Frederic Chopin","year":1839,"key":"E minor","tempo_bpm":120,"time_signature":"4/4","phrase_window":"measures 1-4","phrase_label":"opening — sustained melody over chromatic bass","split":"train","attribution":{"arranger":"Bernd Krueger","license":"CC-BY-SA-3.0","source":"http://piano-midi.de/"},"notes":[{"t":2,"d":1.1354,"n":59,"v":59,"h":"L"},{"t":3.2266,"d":0.2161,"n":71,"v":66,"h":"R"},{"t":3.5182,"d":3.6094,"n":71,"v":85,"h":"R"},{"t":3.5313,"d":0.3411,"n":59,"v":38,"h":"L"},{"t":3.5339,"d":0.3542,"n":64,"v":45,"h":"R"},{"t":3.5365,"d":0.2891,"n":55,"v":24,"h":"L"},{"t":4.1745,"d":0.1432,"n":59,"v":27,"h":"L"},{"t":4.1875,"d":0.1146,"n":55,"v":21,"h":"L"},{"t":4.1875,"d":0.1823,"n":64,"v":35,"h":"R"},{"t":4.8021,"d":0.1745,"n":64,"v":17,"h":"R"},{"t":4.8177,"d":0.1146,"n":55,"v":21,"h":"L"},{"t":4.8203,"d":0.1536,"n":59,"v":16,"h":"L"},{"t":5.3646,"d":0.2031,"n":64,"v":28,"h":"R"},{"t":5.3802,"d":0.1719,"n":55,"v":14,"h":"L"},{"t":5.3802,"d":0.1823,"n":59,"v":17,"h":"L"},{"t":5.901,"d":0.2813,"n":59,"v":29,"h":"L"},{"t":5.901,"d":0.2578,"n":64,"v":45,"h":"R"},{"t":5.9115,"d":0.2292,"n":55,"v":29,"h":"L"},{"t":6.4167,"d":0.2422,"n":55,"v":45,"h":"L"},{"t":6.4167,"d":0.2396,"n":64,"v":52,"h":"R"},{"t":6.4219,"d":0.2474,"n":59,"v":40,"h":"L"},{"t":6.9375,"d":1.5443,"n":72,"v":101,"h":"R"},{"t":6.974,"d":0.3073,"n":64,"v":32,"h":"R"},{"t":6.9792,"d":0.2917,"n":59,"v":25,"h":"L"},{"t":6.9948,"d":0.2656,"n":55,"v":33,"h":"L"},{"t":7.5156,"d":0.1875,"n":64,"v":44,"h":"R"},{"t":7.5182,"d":0.2188,"n":59,"v":31,"h":"L"},{"t":7.5391,"d":0.2005,"n":55,"v":37,"h":"L"}],"annotation":{"structure":"Opening — sustained RH over step-wise chromatic LH descent","key_moments":["m1 E minor opening chord with descending bass","m3 chromatic passing note in bass","m4 dominant B in bass — cadential approach"],"teaching_goals":["sustained RH with slow arm weight","LH chromatic bass: smooth legato, even descent","voicing: bass must be heard but not loud"],"style_tips":["pp throughout — restraint is the piece's power","no pedal changes until after each chromatic step resolves","tempo is very slow — count carefully"]},"trace":{"objective":"Read mm. 1–4 of Prelude in E Minor, Op. 28 No. 4, view the piano roll, analyze the phrase, play in a loop, and predict the continuation.","session":[{"turn":1,"role":"user","content":"Show me measures 1–4 of Chopin's Prelude in E minor and explain the texture."},{"turn":2,"role":"assistant","content":"Let me view the piano roll for mm. 1–4.","calls":["view_piano_roll"]},{"turn":3,"role":"tool","tool":"view_piano_roll","result":{"svg_returned":true,"measures":4,"rh_notes":11,"lh_notes":17}},{"turn":4,"role":"assistant","content":"The Prelude in E minor is one of Chopin's most austere pieces. Measures 1–4 present a quiet, sustained RH chord melody while the LH walks slowly downward through a chromatic bass line. The mood is somber and introspective — the chromatic bass is the motor. Let me loop mm. 1–4.","calls":["play_song"]},{"turn":5,"role":"tool","tool":"play_song","result":{"playback_started":true,"mode":"loop"}},{"turn":6,"role":"assistant","content":"Chopin Prelude E minor mm. 1–4: opening sustained melody, chromatic LH bass descent. Introspective character. Teaching focus: voice independence, sustained tone."}]}}]} |