47 lines
1.5 KiB
Scheme
47 lines
1.5 KiB
Scheme
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;; (grain-buf nc tr dur sndbuf rate pos interp pan envbuf)
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;; Granular synthesis with sound stored in a buffer
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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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;; sndbuf - the buffer holding an audio signal
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;; rate - the playback rate of the sampled sound
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;; pos - the playback position for the grain to start with (0 is
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;; beginning, 1 is end of file)
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;; interp - the interpolation method used for pitchshifting grains.
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;; 1 = no interpolation. 2 = linear. 4 = cubic interpolation
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;; (more computationally intensive).
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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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;; envb - the buffer number containing a singal to use for the
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;; grain envelope. -1 uses a built-in Hanning envelope.
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(with-sc3
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(lambda (fd)
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(async fd (b-alloc-read 10 "/home/rohan/audio/metal.wav" 0 0))
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(let ((g (letc ((gate 1)
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(amp 1)
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(sndbuf 0)
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(envbuf -1))
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(let* ((x (mouse-x kr -1 1 0 0.1))
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(y (mouse-y kr 10 45 0 0.1))
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(i (impulse kr y 0))
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(r (lin-lin (lf-noise1 kr 500) -1 1 0.5 2))
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(p (lin-lin (lf-noise2 kr 0.1) -1 1 0 1)))
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(out 0 (grain-buf 2 i 0.1 sndbuf r p 2 x envbuf))))))
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(send-synth fd "g" g)
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(send fd (s-new2 "g" -1 add-to-tail 1 "sndbuf" 10 "envbuf" -1)))))
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