// Chorus: a slowly wavering delay doubles the sound.
module chorus "Chorus" hp 6 {
  desc de "Chorus: mischt das Signal mit einer Kopie, deren Verzögerung ein langsamer Sinus schwanken lässt – breit und schwebend."
  desc en "Chorus: mixes the signal with a copy whose delay is swayed by a slow sine – wide and shimmering."

  knob   rate  "RATE"  0.05..3 = 0.4 log unit hz
  knob   depth "DEPTH" 0..1 = 0.5
  knob   blend "MIX"   0..1 = 0.5
  in     x     "IN"    audio
  out    y     "OUT"   audio
  buffer line 50 ms

  process {
    write(line, x)
    d = 0.012 + 0.008 * depth * sine(rate)
    y = mix(x, read(line, d), blend)
  }
}