// Seasons Of The Heart — John Denver
// 68 bpm, 4/4, key C major. Source: mcgill.
// Generated by strudelify. One cycle = one bar.
setcpm(68/4)

const chords = arrange(
  // intro (4 bars)
  [4, "<C F C F>"],
  // verse (17 bars)
  [17, "<C F G C!2 F G7 C!2 F G7 C!2 F G7 C [C7@2 ~@2]>"],
  // chorus (7 bars)
  [7, "<[F@2 G7@2] C [F@2 G7@2] C [F@2 G7@2] C [F@2 G7@2]>"],
  // interlude (5 bars)
  [5, "<C F C G ~>"],
  // verse (17 bars)
  [17, "<C F G7 C!2 F G7 C!2 F G7 C!2 F G7 C [C7@2 ~@2]>"],
  // chorus (10 bars)
  [10, "<[F@2 G7@2] C [F@2 G7@2] C [F@2 G7@2] C [F@2 G7@2] C F G7>"],
  // coda (4 bars)
  [4, "<C F C!2>"],
)
const bassline = arrange(
  [4, "<c2 f2 c2 f2>"],
  [17, "<c2 f2 g2 c2!2 f2 g2 c2!2 f2 g2 c2!2 f2 g2 c2 [c2@2 ~@2]>"],
  [7, "<[f2@2 g2@2] c2 [f2@2 g2@2] c2 [f2@2 g2@2] c2 [f2@2 g2@2]>"],
  [5, "<c2 f2 c2 g2 ~>"],
  [17, "<c2 f2 g2 c2!2 f2 g2 c2!2 f2 g2 c2!2 f2 g2 c2 [c2@2 ~@2]>"],
  [10, "<[f2@2 g2@2] c2 [f2@2 g2@2] c2 [f2@2 g2@2] c2 [f2@2 g2@2] c2 f2 g2>"],
  [4, "<c2 f2 c2!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)