// Elvira — Oak Ridge Boys
// 127 bpm, 4/4, key C major. Source: mcgill.
// Generated by strudelify. One cycle = one bar.
setcpm(127/4)

const chords = arrange(
  // intro (4 bars)
  [4, "<[C@3 F] C [C@3 F] C>"],
  // chorus (8 bars)
  [8, "<[C@3 F] C [C@3 F] C!2 G C!2>"],
  // verse (16 bars)
  [16, "<C7!6 G7!2 C7!2 F7!2 C7 G7 C7!2>"],
  // chorus a (8 bars)
  [8, "<[C@3 F] C [C@3 F] C!2 G C!2>"],
  // chorus b (8 bars)
  [8, "<[C@2 C5@2] C5 [C@2 C5@2] C5 C G C!2>"],
  // verse (16 bars)
  [16, "<C7!6 G7!2 C7!2 F7!2 C7 G7 C7!2>"],
  // chorus a (8 bars)
  [8, "<[C@3 F] C [C@3 F] C!2 G C!2>"],
  // chorus b (8 bars)
  [8, "<[C@2 C5@2] C5 [C@2 C5@2] C5 C G C Ab>"],
  // chorus a (2 bars)
  [2, "<[Db@3 Gb] Db>"],
  // fadeout (6 bars)
  [6, "<[Db@3 Gb] Db!2 Ab Db!2>"],
)
const bassline = arrange(
  [4, "<c2!4>"],
  [8, "<c2!5 g2 c2!2>"],
  [16, "<c2!6 g2!2 c2!2 f2!2 c2 g2 c2!2>"],
  [8, "<c2!5 g2 c2!2>"],
  [8, "<c2!5 g2 c2!2>"],
  [16, "<c2!6 g2!2 c2!2 f2!2 c2 g2 c2!2>"],
  [8, "<c2!5 g2 c2!2>"],
  [8, "<c2!5 g2 c2 ab2>"],
  [2, "<db2!2>"],
  [6, "<db2!3 ab2 db2!2>"],
)

// 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)