// Ko-Ko Joe — Jerry Reed
// 102 bpm, 4/4, key A major. Source: mcgill.
// Generated by strudelify. One cycle = one bar.
setcpm(102/4)

const chords = arrange(
  // intro (4 bars)
  [4, "<A!4>"],
  // verse (10 bars)
  [10, "<A!3 E7 A!4 [A@2 C@2] [D@2 A@2]>"],
  // chorus (7 bars)
  [7, "<B7 D7 A7 B7 D!2 [D7 B7 E7@2]>"],
  // trans (2 bars)
  [2, "<A7!2>"],
  // verse (10 bars)
  [10, "<A!3 E7 A!4 [A@2 C@2] [D@2 A@2]>"],
  // chorus (7 bars)
  [7, "<B7 D7 A7 B7 D!2 [D7 B7 E7@2]>"],
  // trans (2 bars)
  [2, "<A7!2>"],
  // verse (10 bars)
  [10, "<A!3 E7 A!4 [A@2 C@2] [D@2 A@2]>"],
  // chorus (7 bars)
  [7, "<B7 D7 A7 B7 D!2 [D7 B7 E7@2]>"],
  // trans (2 bars)
  [2, "<A7!2>"],
  // fadeout (4 bars)
  [4, "<B7 D7 A7 B7>"],
)
const bassline = arrange(
  [4, "<a2!4>"],
  [10, "<a2!3 e2 a2!4 [a2@2 c2@2] [d2@2 a2@2]>"],
  [7, "<b2 d2 a2 b2 d2 c2 [d2 b2 e2@2]>"],
  [2, "<a2!2>"],
  [10, "<a2!3 e2 a2!4 [a2@2 c2@2] [d2@2 a2@2]>"],
  [7, "<b2 d2 a2 b2 d2 c2 [d2 b2 e2@2]>"],
  [2, "<a2!2>"],
  [10, "<a2!3 e2 a2!4 [a2@2 c2@2] [d2@2 a2@2]>"],
  [7, "<b2 d2 a2 b2 d2 c2 [d2 b2 e2@2]>"],
  [2, "<a2!2>"],
  [4, "<b2 d2 a2 b2>"],
)

// chords · gm_piano
const keys = chord(chords).voicing().s("gm_piano").gain(0.8)
// bass · gm_electric_bass_finger
const bass = note(bassline).s("gm_electric_bass_finger").gain(0.9)
// drums
const drums = s("[bd hh] [sd hh] [bd hh] [sd hh]").gain(0.8)

stack(keys, bass, drums)