// Aria variata in A minor BWV 989 — Johann Sebastian Bach
// 76 bpm, 4/4, key A major. Source: midi.
// Generated by strudelify. One cycle = one bar.
// note: sustain pedal (CC 64) lengthens the held notes
// note: Transcription provider: pdmx. https://musescore.com/score/2374611; license: https://creativecommons.org/publicdomain/mark/1.0/
// note: Full arrangement: all 24 bars on a 32-step grid, each part at one level. Source detail keeps the original performance.
setcpm(76/4)

// Notation: c3@3 lasts 3 steps · ~ is a rest · [c3,e3] is a chord · "a, b" plays two voices at once · [...]/2 spreads a riff over 2 bars.
// A part's distinct bars are riffs (A, B, C...) played in order: edit a riff to change every repeat.

// chords · piano · "Harpsichord"
const piano = note("<A B C@2 A B C@2 D E F@2 G H I@2 D E F@2 G H I@2>".pickRestart({
  A: "a4 g4 a4@2 [b3,g#4]@4 g#4 a4 g#4 a4 [d4,b4]@4 g#4 a4 g#4@6 f#4@4 [d3,e4]@4, [a3,e4]@8 [a2,e4]@8 e3@11 ~@5, c4 ~ c4 ~ [b3,e4]@2 [g#3,b3]@2", // E G Dsus2 A5 E5 G#m
  B: "[c3,a3,e4,a4]@8 a4@4 b4@4 d5 c5@3 b4@2 a4@2 a3@4 b3@4, ~ [g#2,e3,d4] [a2,e3,a3,c4] [c4,e4,a4]", // Am E7 Am
  C: "[f#5 e5 f#5@6 ~@4 b3@2 a3@2 f#5 e5 [d#5,e5] d#5 [a3,b4]@4 d#5@2 e5@2 [b3,g4]@4 f#4 g4 ~@6 f#3@4 g#3@2 ~@3 d#4 ~@2 g#3 [g#3,a3] f#3@2 [e2,g#3,b3]@8, a4@15 ~@9 g3@4 ~@6 f#4@9 ~@3 a3@6 ~@12, c4@11 ~@5 b3@12 ~@4 b3@8 [b2,d#4]@8 e3@8 ~@8, d#4@8 [e4,a5]@8 f#4@8 e4@15 ~@5 e4@4 e4@2 e4@13 ~]/2", // Emaj7 Asus2 Em Amaj7 E B A5
  D: "~@11 g4 ~@2 f#3@2, c3@16 b4 c5 b4@2 [a3,a4]@4 [b3,g4]@8, g3 c5 [g3,d4]@2, [e4,c5] [c2,e4]@3, ~ [d4,b4]@2 [f4,d5]@5", // A Em G5 C G Dm
  E: "~@11 b4 ~@2 a3@2, e3@16 d#5 e5 d#5@2 [c#4,c#5]@4 [d#4,b4]@8, b3 e5 [b3,f#4]@2, [g4,e5] [e2,g4]@3, ~ [f#4,d#5]@2 [a4,f#5]@5", // C# G#m B5 C Em D#m D
  F: "[d5 e5 d5@2 c#5@4 d5@4 e5@4 d5@4 [g3,c#5]@4 [f3,d5]@4 [d3,f4]@4 [g2,a#3]@4 a3@2 g3@2 a3 a#3 a3@2 e3@2 ~@3 c#4 ~@2 f#3@2 e3@2 [d2,f#3,a3]@8, [b3,e4]@15 ~ a3@15 ~ e4@11 ~@3 g3@6 ~@12, g#3@8 [e3,g#4]@8 [e4,a4]@8 d4@15 ~@5 d4@4 d4@2 d4@13 ~, ~@9 a#2 [a2,c#4]@2 d3@2 ~@2]/2", // Gdim Dm Gm D E5 E A5 A
  G: "f5 e5 f5@2 g5@4 g5@2 a5@2 [a#2,d4,g4,d5]@4 c#5 d5 c#5@2 [d4,b4]@4 b4@4 a4@4, [a3,a4]@11 ~@5 e4@4 ~@4 [c#4,e4]@8, [d3,d4] e4 a4 ~, ~@8 c3@4 ~@4 a2@15 ~", // Gm G A C#m D
  H: "c5 b4 c5@2 d5@4 d5@2 e5@2 [f3,d4,a4]@4 [b3,g#4]@4 [a3,f#4]@4 [g#3,b3,e4]@8, e4@11 ~@5 e4@8 ~@8, [a3,a4]@8 [g3,b3]@4 ~@4 e3@15 ~", // Dm E D E A G
  I: "[f5@8 d5 e5 d5@2 b4@4 a4 g#4 a4 g#4 e4@4 g#4@4 c4@4 ~@6 b4 c5 g#4 a4 g#4@4 a4@2 ~@4 c#4 [c#4,d4] b3@2 b3@4 c#4@4, [d3,b3]@23 ~ [d#3,f#3]@8 b3@15 ~@17, d4@15 ~ e4@4 ~@8 a4@8 c4@4 d4@11 ~@13, ~@32 e3@8 e2@8 [a2,a3,e4,a4]@15 ~]/2", // Dmaj7 G D#m A5
})).s("gm_piano").gain(0.3)

stack(piano)