81 lines
1.7 KiB
Racket
81 lines
1.7 KiB
Racket
#lang racket
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(require rsc3)
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#|
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tracks:
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0 - output left speaker
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1 - output right speaker
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3 - first track
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## example usage
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; add reverb to track 3
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(append-effect track3 (reverb-effect 0.5 0.9))
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(append-effect track3 (reverb-effect 0.5 0.9))
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; done internally:
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; (process-track 3)
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(define my-piano (make-instrument "piano"))
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(note-on my-piano C#3 track3)
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|#
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(define num-tracks 8)
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(define tracks (make-vector num-tracks '()))
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;; returns the effect list for a given track
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;; track-num is 1-based
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(define (get-track-effects track-num)
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(vector-ref tracks track-num))
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;; adds an effect to the end of the effect chain of the given track
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(define (append-effect track-num effect-ugen)
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(define current-effects (get-track-effects track-num))
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(vector-set! tracks track-num
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(append current-effects (list effect-ugen))))
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(append-effect 3 'reverb)
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(append-effect 3 'echo)
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;; creates a ugen that is routed
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;; in-bus: input bus channel
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;; out-bus: output bus channel
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(define (make-effect-ugen effect-ugen in-bus out-bus)
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; TODO
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empty)
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;; example effect ugen
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#;(audition (out 0 (free-verb (in 1 ar 16) 0.5
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(mouse-y kr 0 1 0 0.1)
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0.5)))
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;; ======= Effects ==========
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(define (apply-effect bus effect)
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(audition (replace-out bus effect)))
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(define (reverb bus)
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(apply-effect bus
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(free-verb (in 1 ar bus)
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0.5
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(mouse-y kr 0 1 0 0.1)
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0.5)))
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; example: apply reverb on bus 0
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; (reverb 0)
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(define (moog-filter bus freq [resonance 3] [opt 0])
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(apply-effect bus
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(moog-ff (in 1 ar bus) freq resonance opt)))
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; (add-effect track0 (reverb 0.3 6)
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