// Prelude in G — Bach Johann Sebastian
// 89 bpm, 4/4, key D major. Source: midi.
// Generated by strudelify. One cycle = one bar.
// note: Full arrangement: all 19 bars on a 48-step grid, each part at one level. Source detail keeps the original performance.
setcpm(89/4)

// 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 · "A.PIANO 1"
const piano = note("<A B C D E F@2 G H I@3 J@4 K@2 L>".pickRestart({
  A: "[g3,g4]@2 ~@2 d5@2 g5@2 d5@2 b4@2 d5@2 b4@2 g4@2 [g3,b4]@2 g4@2 d4 ~ [g3,e4]@2 g4@2 c5@2 e5@2 c5@2 g4@2 c5@2 g4@2 e4 ~ [g3,g4]@2 e4@2 c4@2, ~@2 b4@4 g2@6 ~@18 g2@5 ~@13", // G C G
  B: "[g3,a3]@2 c4@2 f#4@2 [g2,a4]@2 f#4@2 c4@2 f#4@2 c4@2 a3 ~ c4@2 a3 ~ f#3 ~ g3@2 b3@2 d4@2 [g2,g4]@2 d4@2 b3@2 d4@2 b3 ~ g3@2 b3@2 ~ e3@3, ~@18 g3 ~@25 g3@2 ~@2", // Gsus2 G
  C: "[g3,a3]@2 c#4@2 e4@2 [g2,a4]@2 e4@2 c#4@2 e4@2 c#4 ~ a3@2 c#4@2 a3@2 e3@2 f#3@2 a3@2 c#4@2 d4@2 a3@2 f#3@2 a3@2 f#3@2 d3 ~ [f#3,d4]@2 d3@2 b2@2, ~@18 g3 ~@5 d4 ~@23", // Gsus2 D
  D: "[e3,d4]@2 c#4 ~ d4@2 [e2,e4]@2 c#4 ~ d4@2 f#4@2 c#4@2 d4@2 [e3,g4]@2 c#4@2 d4@2 [c#3,a4]@2 c#4@2 d4@2 [a2,b4]@2 c#4@2 d4@2 [b2,a4]@2 c#4@2 d4@2 [c#3,g4]@2 c#4@2 d4@2", // E7 E Em F#m Asus2 B7 C#dim
  E: "[d3,f#4]@2 c#4@2 d4@2 [e3,g4]@3 c#4@2 ~ f#3@2 c#4@2 ~ d4@2 [g3,b4]@2 c#4@2 d4 ~ [f#3,a4]@2 c#4@2 d4@2 [e3,g4]@2 c#4@2 d4 ~ [d3,f#4]@2 c#4@2 d4@2 ~ c#4@2 d4 ~, ~@11 d4@2 ~@30 [f#3,a4]@2 ~@3, ~@3 a4 ~@8", // D Em G F#m Em D F#m
  F: "[~@2 b4@3 d5@2 f5@2 d5@2 b4@2 d5@2 ~ g#4@2 [a3,b4]@2 g#4@2 e4@2 [g#3,d4]@2 f4@2 g#4@3 [g#2,b4]@2 g#4@2 f4@2 ~ f4 ~ d4@2 ~@2 d4 ~@2 b3@2 a3@2 c4@2 e4@2 [a4,e5]@2 e4@2 c4@2 [e4,c5]@2 c4@2 a3 ~ [c4,a4]@2 a3 ~ e3@2 [c3,e4]@2 e3@2 a3@2 [c4,e5]@2 a3 ~ e3 ~@2 e3@2 c3 ~ [e3,a4]@2 c3 ~ a2@2, ~ [b2,g#4]@3 ~@3 b3@6 ~@2 b4@2 ~@20 g#4@2 ~@3 g#3@3 ~@4 c4 ~@34 a3@2 ~@10, ~@43 f4@2 ~@40 c5@3 ~@8]/2", // Asus2 G#dim G#m A5 C F C A5 …
  G: "[f#2,d#5]@2 f#5@2 a5@2 c6@2 a5@2 f#5@2 a5@2 f#5@2 d#5@2 [e3,f#5]@2 d#5@2 b4@2 [d#3,a4]@2 c5@2 d#5@2 f#5@2 d#5@2 c5@2 d#5@2 c5 ~ a4@2 [d#3,c5]@2 ~ f#4@2 ~, ~@6 f#3@7 ~@17 d#2@6 ~@8 a4@2 ~@2", // D#m Esus2 D#dim Cm
  H: "~ d#4@2 ~ e4 ~@2 d#4@2 e4@2 ~ [g3,b4]@2 d#4@2 e4@2 [a3,c5]@2 d#4@2 e4 ~ [g3,b4]@2 d#4@2 e4 ~ [f#3,a4]@2 d#4@2 e4 ~ [e3,g4]@2 d#4 ~ e4 ~ [g3,b4]@2 d#4 ~ e4 ~, [e3,g4] ~ [f#3,a4] ~@13", // G Am G F#m Em G Em F#m
  I: "[[c#3,a4]@2 g#4@2 a4@2 [d3,b4]@2 g#4 ~ a4@2 [e3,c#5]@2 g#4@2 a4@2 [f#3,d5]@2 ~ a4@2 [c#3,e5]@3 ~ a4@2 [b2,f#5]@2 g#4@2 a4@2 [a2,g5]@2 e5@2 c#5@2 [c#3,a4]@2 c#5@2 e5@2 ~@4 a3@2 d4@2 ~ f#3@3 [d3,a5]@2 ~ d5@2 ~ [d4,c5]@2 ~ f#5@2 ~@2 g3@2 b3@2 ~ [d4,g5]@2 ~ g3@3 [d3,g5]@2 e5@2 c#5@2 [d4,a4]@2 c#5@2 e5@2 d3@2 a3@3 ~ [d4,f#5]@2 a3@2 f#3@2 [d3,f#5]@3 ~ b4@2 g4@2 b4@2 d5@2 ~@2 e3@3 ~ [b3,e5]@2 g3@2 e3@2 [d3,e5]@2 c#5@2 a4@2 g4@2 a4@2 c#5@2 ~, ~@20 g#4@2 ~@4 g#4@2 ~@19 [d3,f#5]@7 ~@17 d3@10 ~@19 c#4@2 ~@3 d4 ~@7 d4 ~@6 d3@3 ~ g3@2 ~@11 d4 ~@6, ~@49 f#3@4 ~@2 a3@2 ~@4 f#5@2 ~@4 d5@2 ~ a5@7 ~@2 b3@2 ~@14 g5@7 ~@8 d5@2 ~@8 f#5@6 ~@18]/3", // F#m G C#m D C#m B5 A7 F#m …
  J: "[~@2 f#3@2 a3@2 d4 ~ a3 ~ f#3@2 a3@2 f#3@2 d3 ~ f#3@2 d3@2 c3 ~ d5@2 c5@2 [f#3,b4] ~ [g3,b4]@2 a4@2 [b2,g4] ~ d3@2 ~ g2 ~@5 [f2,d5] ~@3 [g2,e5]@2 ~@4 e3@2 g3@2 c4@2 g3 ~ e3 ~ g3@2 e3@2 d3 ~ e5 ~@2 [e3,d5] g3 c#5 [a3,c#5]@2 ~@2 [c#3,a4]@2 ~@3 c#3@2 e5@2 a2 [g2,f#5]@2 ~ e5 e5@2 [a2,f#5]@2 [c#3,g5]@2 d3 ~@3 a3@2 d4@2 a3 ~ f#3@2 [a3,a5]@2 f#3@2 d3 ~ [f#3,a5]@2 [d3,g5]@2 [a2,f#5] ~ [d3,f#5]@2 [a2,e5]@2 f#2@2 d5@2 ~@2 a5@2 c6@2 b5@2 a5 ~ a5@2 b5@2 c6@2 ~@2 b2@2 d3@2 g3@2 [a3,a5]@3 g5@2 ~@2 e5@2 [d4,d5]@2 ~@2 e5@2 g5@2 [c4,a5]@2 [a3,f#5]@2 [f#3,d5]@2 d4@2 d5@2 f#5@2 [b3,g5]@2 [g3,e5]@2 [e3,c5]@2, e5@7 ~@19 d3 ~@5 d3 ~@3 g4 ~@3 d5@2 f5@2 e5@2 ~@2 d5@3 ~@2 e5@10 ~@2 e5@4 ~@11 b4@2 ~@4 c#5@4 g5@3 ~@8 f#5@12 ~@16 d5 ~@3 f#5@4 ~@12 b5@9 ~@34, d3@4 ~@2 d5@10 ~@2 d5@4 ~@2 b2@4 ~@10 [b2,b4]@2 ~ b2@4 ~@6 [b2,f5]@2 ~@35 a2 ~@5 f#2@5 ~@32 d2@6 ~@6 g2@12 ~@8 c4@2 ~@3 [e4,c5]@4 ~@8 b4@4 ~@8, ~@43 g2@2 ~@2 e2@5 c3@2 ~@18 c#3@4 ~@3 e3@2 ~@4 [e3,a4]@2 ~@16 f#3@4 ~@30 d3@5 ~@18 b3 ~ [b3,f5]@2 ~@28]/4", // B5 G Em Dm C E7 A F#m …
  K: "[[c4,a4]@2 c5@2 e5@2 [a3,f#5]@2 [f#3,d5]@2 [d3,b4]@2 [b3,g4]@2 ~@2 d5@2 [g3,e5]@2 e3@2 [c3,a4]@2 a3@2 a4@2 c5@2 [f#3,d5]@2 b4 [b2,g4]@2 ~ g3 ~@2 b4@2 ~@4 [a2,f#4]@2 ~ d4@2 ~ a4@2 [d3,b4]@2 b2@2 [g2,e4]@2 e3@2 [c3,e4]@2 g4@2 [f#3,a4]@2 [d3,f#4]@2 [b2,d4]@2 b3@2 d4@2 f#4@2 g4@2 e4@2 ~@4 c4@2 ~@4 d4@2 c4@3, ~@14 b4@4 ~@2 c5 ~@3 f#4@4 ~@4 d3@2 ~ e4@3 g4@3 c5@2 c3@2 ~@2 f#3@2 ~@10 c4@5 ~@7 g3@6 e3@5 a3@3 ~@2 e4@2 d3@7, ~@42 e3@2 a4@2 ~@4 f#4@3 ~@2 g4 ~@7 a2 ~@17 c4@2 c3@5 f#4@3 ~@5]/2", // F D G Em C F D Em …
  L: "[g2,b3,d4,g4]@19 ~@5, g3 ~@47", // G
})).s("gm_piano").gain(0.48)

stack(piano)