39. pdhalf

pdhalf applies a classic phase distortion to an incoming phasor signal in using some distortion amount amt, which is in range -1,1. Warping works by adjusting the midpoint. Positive values shift it in the upwards direction, negative values shift it in the downwards direction. 0 keeps it in the middle (no change).

(define (pdhalf in amt)
  (param in)
  (param amt)
  (rvl "pdhalf"))

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