// bellyache — Billie Eilish
// 120 bpm, 4/4, key G major. Source: midi.
// Generated by strudelify. One cycle = one bar.
// note: metre changes (4/4 at bar 1, 47/32 at bar 42, 4/4 at bar 43, 19/16 at bar 44, ...) are rendered on a constant 4/4 grid of one bar per cycle
// note: Transcription provider: pdmx. https://musescore.com/score/5979224; license: https://creativecommons.org/publicdomain/zero/1.0/
// note: Full arrangement: all 78 bars on a 24-step grid, each part at one level. Source detail keeps the original performance.
setcpm(120/4)

// 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
const piano = note(`<
  A B C@2 D E F G D E G@2 D E G F H I J@2 H I J@2 H I J@2 H I J@2 H I J K L M N@2 L O P@8 Q@6 R@4 S@7 T@8 U@3
>`.pickRestart({
  A: "[c2,c3,c4,e4,g4]", B: "[a3,c4,e4]@3 ~, [a2,e3]", C: "[e2,b2,e3,g3,b3]/2",
  D: "[c4,e4,g4]@3 ~@3 [c4,e4,g4]@2, [c3,g3]@5 [c3,g3]@3, ~@3 [c4,e4,g4]@3 ~@2", // C C5 C
  E: "[a3,c4,e4]@3 ~@3 [a3,c4,e4]@2, [a2,e3]@5 [a2,e3]@3, ~@3 [a3,c4,e4]@3 ~@2", // Am A5 Am
  F: "[e3,g3,b3]@3 g3 ~@2 [e3,g3,b3]@2, [e2,b2]@5 [e2,b2]@3, ~@3 [e3,b3]@3 ~@2, ~@2 g3 ~", // Em E5
  G: "[e3,g3,b3]@3 ~@3 [e3,g3,b3]@2, [e2,b2]@5 [e2,b2]@3, ~@3 [e3,g3,b3]@3 ~@2", // Em E5 Em
  H: "[c4,e4,g4]@2 ~ g3, [c3,g3]@3 ~, ~ [c4,e4,g4]", I: "[a3,c4,e4]@2 ~ e3, [a2,e3]@3 ~, ~ [a3,c4,e4]",
  J: "[e3,g3,b3]@2 ~ b2, [e2,b2]@3 ~, ~ [e3,g3,b3]", K: "[e2,b2,e3,g3,b3]!4 ~@4",
  L: "[c4,e4,g4]@2 ~ c3, [c2,c3]@3 ~, ~ [c4,e4,g4]", M: "[a3,c4,e4]@2 ~ a2, [a1,a2]@3 ~, ~ [a3,c4,e4]",
  N: "[e3,g3,b3]@2 ~ e2, [b1,e2]@3 ~, ~ [e3,g3,b3]", O: "[a3,c4,e4]!2, [a1,a2]@3 ~",
  P: "[~@5 a2@6 [e3,g3,b3]@12 ~@6 e2@6 [e3,g3,b3]@12 ~@6 e2@6 ~@5 [c4,e4,g4]@9 ~@3 [a3,c4,e4]@9 ~@9 [a3,c4,e4]@6 [e3,g3,b3]@9 ~@9 [e3,g3,b3]@6 [e3,g3,b3]@9 ~@9 [e3,g3,b3]@6 [c4,e4,g4]@9 ~@9 [c4,e4,g4]@6 [a3,c4,e4]@9 ~@9 [a3,c4,e4]@2, ~@11 [b1,e2]@18 ~@6 [b1,e2]@18 ~@23 [a2,e3]@15 [a2,e3]@9 [e2,b2]@15 [e2,b2]@9 [e2,b2]@15 [e2,b2]@9 ~@44, ~@23 [e3,g3,b3]@12 ~@12 [e3,g3,b3]@12 ~@5 [c3,g3]@27 ~@18 [e3,g3,b3]@9 ~@15 [e3,g3,b3]@9 ~@21 [c3,g3]@9 [a2,e3]@15 [a2,e3]@5, ~@85 [a3,c4,e4]@9 ~@63 [c4,e4,g4]@9 ~@15 [a3,c4,e4]@9 ~@2]/8", // Em C Am Em C Am E5 A5 …
  Q: "[~@4 [e3,g3,b3]@9 ~@9 [e3,g3,b3]@6 [e3,g3,b3]@9 g3@3 ~@6 [e3,g3,b3]@6 [c4,e4,g4]@12 ~@6 g3@6 [a3,c4,e4]@12 ~@6 e3@6 [e3,g3,b3]@12 ~@6 b2@6 [e3,g3,b3]@12 ~@6 b2@2, ~@4 [e2,b2]@15 [e2,b2]@9 [e2,b2]@15 [e2,b2]@9 ~@48 [e2,b2]@18 ~@6 [e2,b2]@18 ~@2, ~@13 [e3,g3,b3]@9 ~@15 [e3,b3]@9 ~@6 [c3,g3]@18 ~@6 [a2,e3]@18 ~@50, ~@20 g3@3 ~@9 [c4,e4,g4]@6 ~@6 [a3,c4,e4]@6 ~@6 [e3,g3,b3]@6 ~@6 [e3,g3,b3]@4]/6", // Em C Am Em E5 Em E5 C5 …
  R: "[~@4 [c4,e4,g4]@9 ~@9 [c4,e4,g4]@6 [a3,c4,e4]@9 ~@9 [a3,c4,e4]@6 [e3,g3,b3]@9 ~@9 [e3,g3,b3]@6 [e2,b2,e3,g3,b3]@3 [e2,b2,e3,g3,b3]@3 [e2,b2,e3,g3,b3]@3 [e2,b2,e3,g3,b3]@3 ~@8, ~@4 [c3,g3]@15 [c3,g3]@9 [a2,e3]@15 [a2,e3]@9 [e2,b2]@15 [e2,b2]@9 ~@20, ~@13 [c4,e4,g4]@9 ~@15 [a3,c4,e4]@9 ~@15 [e3,g3,b3]@9 ~@26]/4", // C Am Em C5 A5 E5 C Am …
  S: "[~@4 [c4,e4,g4]@9 ~@9 [c4,e4,g4]@6 [a3,c4,e4]@9 ~@9 [a3,c4,e4]@6 [e3,g3,b3]@9 ~@9 [e3,g3,b3]@6 [e3,g3,b3]@9 ~@9 [e3,g3,b3]@6 [c4,e4,g4]@9 ~@9 [c4,e4,g4]@6 [a3,c4,e4]@9 [a3,c4,e4]@15 ~@11 [b1,e2,e3,g3,b3]@9, ~@4 [c2,c3]@15 c3@9 [a1,a2]@15 a2@9 [b1,e2]@15 [b1,e2]@9 [b1,e2]@15 e2@9 [c2,c3]@15 c3@9 [a1,a2]@24 ~@20, ~@13 [c4,e4,g4]@9 ~@15 [a3,c4,e4]@9 ~@15 [e3,g3,b3]@9 ~@15 [e3,g3,b3]@9 ~@15 [c4,e4,g4]@9 ~@50]/7", // C Am Em C Am Em C A …
  T: "[~@3 [e3,g3,b3]@2 [e3,g3,b3]@4 ~@4 [c4,e4,g4]@3 ~@3 [c4,e4,g4]@2 [a3,c4,e4]@3 ~@3 [a3,c4,e4]@2 [e3,g3,b3]@3 ~@3 [e3,g3,b3]@2 [e3,g3,b3]@3 ~@3 [e3,g3,b3]@2 [c4,e4,g4]@3 ~@3 [c4,e4,g4]@2 [a3,c4,e4]@3 e4@2 e4@4 ~@2, [e3,g3,b3]@3 ~@13 [c4,e4,g4]@3 ~@5 [a3,c4,e4]@3 ~@5 [e3,g3,b3]@3 ~@5 [e3,g3,b3]@3 ~@5 [c4,e4,g4]@3 ~@5 [a3,c4]@6 ~@2, ~@2 [b1,e2]@3 [b1,e2]@6 ~@2 [c2,c3]@5 c3@3 [a1,a2]@5 a2@3 [b1,e2]@5 [b1,e2]@3 [b1,e2]@5 e2@3 [c2,c3]@5 c3@3 [a1,a2]@8 ~@3]/8", // Em C Am Em C Am Em C …
  U: "[~@2 [e3,g3,b3]@9 ~@6 [b1,e2]@3 [b1,e2]@3 [b1,e2]@3 [e3,g3,b3]@24 ~@22, ~@2 [b1,e2]@15 ~@9 [e2,b2]@18 ~@28, ~@11 [e3,g3,b3]@9 [e3,g3,b3]@6 ~@46]/3", // Em E5 Em E5 Em
})).s("gm_piano").gain(0.24)

stack(piano)