29 lines
847 B
Text
29 lines
847 B
Text
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#lang scribble/manual
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@(require (for-label racket))
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@title{(pv-mag-smear buffer bins)}
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Average a bin's magnitude with its neighbors.
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buffer - fft buffer.
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bins - number of bins to average on each side of bin.
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As this number rises, so will CPU usage.
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(with-sc3
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(lambda (fd)
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(async fd (b-alloc 10 2048 1))
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(async fd (b-alloc-read 12 "/home/rohan/audio/metal.wav" 0 0))))
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(let* ((dup (lambda (a) (mce2 a a)))
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(in (mul (lf-saw ar 500 0) (decay2 (mul (impulse ar 2 0) 0.2) 0.01 2)))
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(c0 (fft* 10 in))
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(c1 (pv-mag-smear c0 (mouse-x kr 0 100 0 0.1))))
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(audition (out 0 (mul 0.5 (dup (ifft* c1))))))
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(let* ((dup (lambda (a) (mce2 a a)))
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(s (play-buf 1 12 (buf-rate-scale kr 12) 1 0 1))
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(x (mouse-x kr 0 100 0 0.1)))
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(audition (out 0 (mul 0.5 (dup (ifft* (pv-mag-smear (fft* 10 s) x)))))))
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