39 lines
1.1 KiB
Racket
39 lines
1.1 KiB
Racket
#lang scribble/manual
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@(require (for-label racket))
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@title{(grain-fm nc tr dur carfreq modfreq index pan envbuf)}
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Granular synthesis with frequency modulated sine tones
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nc - the number of channels to output. If 1, mono is returned and
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pan is ignored.
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tr - a kr or ar trigger to start a new grain. If ar, grains after
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the start of the synth are sample accurate.
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The following args are polled at grain creation time
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dur - size of the grain.
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carfreq - the carrier freq of the grain generators internal
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oscillator
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modfreq - the modulating freq of the grain generators internal
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oscillator
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index - the index of modulation
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pan - a value from -1 to 1. Determines where to pan the output in
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the same manner as pan-az.
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envbuf - the buffer number containing a singal to use for the grain
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envelope. -1 uses a built-in Hanning envelope.
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(let* ((x (mouse-x kr -0.5 0.5 0 0.1))
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(y (mouse-y kr 0 400 0 0.1))
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(n (white-noise kr))
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(fd (add 440 (mul n y)))
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(t (impulse kr 10 0))
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(i (lin-lin (lf-noise1 kr 500) -1 1 1 10)))
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(audition (out 0 (mul (grain-fm 2 t 0.1 fd 200 i x -1) 0.1))))
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