42 lines
982 B
Scheme
42 lines
982 B
Scheme
; pvcollect
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(define no-op
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(lambda (m p _)
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(list m p)))
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(define rand-phase
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(lambda (m p _)
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(list m (rand 0 3.14))))
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(define noise-phase
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(lambda (m p _)
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(list m (lin-lin (lf-noise0 3) -1 1 0 3.14))))
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(define combf
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(lambda (m p i)
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(list (if (= (modulo i 7) 0) m 0) p)))
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(define noise-mag
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(lambda (m p _)
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(list (mul (gt (lf-noise0 10) 0) m) p)))
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(define spectral-delay
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(lambda (m p _)
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(let ((v (lin-lin (lf-par 0.5 0) -1 1 0.1 1)))
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(list (add m (delay-n m 1 v)) p))))
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(define (bpf-sweep nf)
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(lambda (m p i)
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(let ((e (u:abs (sub i (lin-lin (lf-par 0.1 0) -1 1 2 (/ nf 20))))))
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(list (mul (lt e 10) m) p))))
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(with-sc3
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(lambda (fd)
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(async fd (b-alloc 10 1024 1))
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(async fd (b-alloc-read 11 "/home/rohan/data/audio/metal.wav" 0 0))))
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(let* ((nf 1024)
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(i (play-buf 1 11 (buf-rate-scale 11) 1 0 loop do-nothing))
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(c1 (fft* 10 i))
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(c2 (pvcollect c1 nf spectral-delay 0 250 0)))
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(mul 0.1 (ifft* c2)))
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