// It Amazes Me — John Denver
// 173 bpm, 4/4, key D major. Source: mcgill.
// Generated by strudelify. One cycle = one bar.
setcpm(173/4)

const chords = arrange(
  // intro (8 bars)
  [8, "<[D@2 A D] [D A D A] [D@2 A D] [D A D@2] [A@2 D Dsus] Dsus!3>"],
  // verse (19 bars)
  [19, "<D!2 [D@2 A D] [D A D@2] D!3 [D@2 A@2] [Bm A7@2 Em] [Em D@3] D [D G@3] [D@2 G D] D!3 [D@3 A] [A D A@2] [D A D ~]>"],
  // verse (21 bars)
  [21, "<D!2 [D@2 A D] [D A D@2] D!3 [D@2 A@2] [D A@2 Em] [Em D@3] D [D G@3] [D@2 G D] D!3 [D@3 A7] A7!3 [A7@3 ~]>"],
  // chorus (15 bars)
  [15, "<D!2 G!2 [G@3 D] D!2 [D@3 G] G!2 [G@3 A7] A7!3 [A7@3 ~]>"],
  // verse (21 bars)
  [21, "<D!2 [D@2 A D] [D A D@2] D!3 [D@2 A@2] [Bm A7@2 Em] [Em D@3] D [D G@3] [D@2 G D] D!3 [D@3 A7] A7!3 [A7@3 ~]>"],
  // chorus (19 bars)
  [19, "<D!2 G!2 [G@3 D] D!2 [D@3 G] G!2 [G@3 D] [D A D@2] [A D A D] [D A D@2] [A D@2 A7] A7!3 [A7@3 ~]>"],
  // outro (7 bars)
  [7, "<D!7>"],
)
const bassline = arrange(
  [8, "<d2!8>"],
  [19, "<d2!16 [d2@3 c#2] [c#2 b2 a2@2] [g2 f#2 e2 ~]>"],
  [21, "<d2!16 [d2@3 a2] [a2 e2@2 a2] [a2 e2@2 c#2] [c#2 b2 a2@2] [g2 f#2 e2 ~]>"],
  [15, "<d2!2 g2!2 [g2@3 d2] d2!2 [d2@3 g2] g2!2 [g2@3 a2] [a2 e2@2 a2]!3 [a2 e2@2 ~]>"],
  [21, "<d2!16 [d2@3 a2] [a2 e2@2 a2]!3 [a2 e2@2 ~]>"],
  [19, "<d2!2 g2!2 [g2@3 d2] d2!2 [d2@3 g2] g2!2 [g2@3 d2] d2!3 [d2@3 a2] a2!3 [a2@3 ~]>"],
  [7, "<d2!7>"],
)

// 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)