// Let's Get Serious — Jermaine Jackson
// 109 bpm, 4/4, key Bb minor. Source: mcgill.
// Generated by strudelify. One cycle = one bar.
setcpm(109/4)

const chords = arrange(
  // intro (12 bars)
  [12, "<Bbm7 Ebm7 Bbm7!3 Ebm7 Bbm7!3 Ebm7 Bbm7!2>"],
  // verse (8 bars)
  [8, "<Bbm7 Ebm7 Bbm7!3 Ebm7 Bbm7!2>"],
  // pre-chorus (5 bars)
  [5, "<[Ebm7 Db Ebm Eb7] [Ab7sus@2 Ab7@2] [Ebm7 Db Ebm Eb7] [Ab7sus@2 F7@2] [F7@2 ~@2]>"],
  // verse (8 bars)
  [8, "<Bbm7 Ebm7 Bbm7!3 Ebm7 Bbm7!2>"],
  // pre-chorus (5 bars)
  [5, "<[Ebm7 Db Ebm Eb7] [Ab7sus@2 Ab7@2] [Ebm7 Db Ebm Eb7] [Ab7sus@2 F7@2] [F7@2 ~@2]>"],
  // chorus (8 bars)
  [8, "<Bbm7!2 [Ebm7 Db Ab Fm7] Bbm7!3 [Ebm7 Db Ab Fm7] Bbm7>"],
  // bridge (8 bars)
  [8, "<Cb^7 Bbm7 Cb^7 Bbm7 [Cb^7@2 Bbm7@2] [Ab@2 Gb^7@2] [Gb^7@2 F7@2] [F7@2 ~@2]>"],
  // interlude (4 bars)
  [4, "<Bbm7 Ebm7 Bbm7!2>"],
  // verse (8 bars)
  [8, "<Bbm7 Ebm7 Bbm7!3 Ebm7 Bbm7!2>"],
  // pre-chorus (5 bars)
  [5, "<[Ebm7 Db Ebm Eb7] [Ab7sus@2 Ab7@2] [Ebm7 Db Ebm Eb7] [Ab7sus@2 F7@2] [F7@2 ~@2]>"],
  // chorus (24 bars)
  [24, "<Bbm7!2 [Ebm7 Db Ab Fm7] Bbm7!3 [Ebm7 Db Ab Fm7] Bbm7!3 [Ebm7 Db Ab Fm7] Bbm7!3 [Ebm7 Db Ab Fm7] Bbm7!3 [Ebm7 Db Ab Fm7] Bbm7!3 [Ebm7 Db Ab Fm7] Bbm7>"],
  // fadeout (4 bars)
  [4, "<Bbm7!2 [Ebm7 Db Ab Fm7] Bbm7>"],
)
const bassline = arrange(
  [12, "<bb2 eb2 bb2!3 eb2 bb2!3 eb2 bb2!2>"],
  [8, "<bb2 eb2 bb2!3 eb2 bb2!2>"],
  [5, "<[eb2 f2 gb2 g2] ab2 [eb2 f2 gb2 g2] [ab2@2 a2@2] [a2@2 ~@2]>"],
  [8, "<bb2 eb2 bb2!3 eb2 bb2!2>"],
  [5, "<[eb2 f2 gb2 g2] ab2 [eb2 f2 gb2 g2] [ab2@2 a2@2] [a2@2 ~@2]>"],
  [8, "<bb2!2 [eb2 db2 c2 f2] bb2!3 [eb2 db2 c2 f2] bb2>"],
  [8, "<b2 bb2 b2 bb2 [b2@2 bb2@2] [ab2@2 gb2@2] [gb2@2 f2@2] [f2@2 ~@2]>"],
  [4, "<bb2 eb2 bb2!2>"],
  [8, "<bb2 eb2 bb2!3 eb2 bb2!2>"],
  [5, "<[eb2 f2 gb2 g2] ab2 [eb2 f2 gb2 g2] [ab2@2 a2@2] [a2@2 ~@2]>"],
  [24, "<bb2!2 [eb2 db2 c2 f2] bb2!3 [eb2 db2 c2 f2] bb2!3 [eb2 db2 c2 f2] bb2!3 [eb2 db2 c2 f2] bb2!3 [eb2 db2 c2 f2] bb2!3 [eb2 db2 c2 f2] bb2>"],
  [4, "<bb2!2 [eb2 db2 c2 f2] bb2>"],
)

// 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)