// Hark the Herald Angels Sing — Felix Mendelssohn
// 120 bpm, 4/4, key G major. Source: midi.
// Generated by strudelify. One cycle = one bar.
// note: ch 3 "Bass" named as a bass, played on electric bass finger (its piano patch is not one); ch 4 "Bass" named as a bass, played on electric bass finger (its piano patch is not one)
// note: Transcription provider: pdmx. https://musescore.com/score/416651; license: https://creativecommons.org/publicdomain/mark/1.0/
// note: Full arrangement: all 20 bars on a 16-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.
// A part's distinct bars are riffs (A, B, C...) played in order: edit a riff to change every repeat.

// other · piano · "Tenor"
const piano = note("<A B C D A E F G H D H D I J K L M J K N>".pickRestart({
  A: "g3@2 b3@2 b3@3 a3", B: "g3 d4 d4@2", C: "d4@2 d4@2 e4@3 e4", D: "d4!2 d4@2", E: "g3!2 g3@2",
  F: "f#3@2 a3@2 d4@3 a3", G: "a3!2 f#3@2", H: "b3!2 d4!2", I: "e4!2 c4 d4", J: "e4!2 e4@2", K: "d4@2 c4@2 b3@3 b3",
  L: "b3 d4 d4@2", M: "e4@3 e4 c4@2 d4@2", N: "b3 c4 b3@2",
})).s("gm_piano").gain(0.3)

// bass · electric bass finger · "Bass"
const bass = note("<A B C D A E F G H I J I K L M N O L M P>".pickRestart({
  A: "b2@2 d3@2 d3@3 d3", B: "d3 g3!2 f#3", C: "g3@2 g3@2 a3@3 a3", D: "g3 f#3 g3@2", E: "d3!2 c#3@2",
  F: "d3@2 e3@2 f#3@3 d3", G: "d3 c#3 d3@2", H: "d3 g3!3", I: "a3 g3!2 f#3", J: "d3 b3!2 g3", K: "g3!3 g#3",
  L: "a3 g#3 a3@2", M: "f#3@2 f#3@2 g3@3 g3", N: "g3 a3 b3@2", O: "g3@3 g3 g3@2 g#3@2", P: "e3 f#3 d3@2",
})).s("gm_electric_bass_finger").gain(0.3)

// bass · electric bass finger · "Bass"
const bass_2 = note("<A B C D A E F G H I H I J K L M N K L M>".pickRestart({
  A: "g2@2 g3@2 g3@3 d3", B: "b2 g2 d3@2", C: "b2@2 b2@2 c3@3 c3", D: "d3!2 g3@2", E: "b2 g2 e3@2",
  F: "d3@2 c#3@2 d3@3 d3", G: "f#2 a2 d3@2", H: "g3!2 b3!2", I: "f#3 g3 d3@2", J: "c3!3 b2", K: "a2 e3 a3@2",
  L: "d3@2 d3@2 g3@3 g3", M: "e3 d3 g3@2", N: "c3@3 c3 c3@2 b2@2",
})).s("gm_electric_bass_finger").gain(0.3)

stack(piano, bass, bass_2)