34 lines
880 B
Text
34 lines
880 B
Text
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#lang scribble/manual
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@(require (for-label racket))
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@title{allocate and fill tables 0 to 7 with a generated list of harmonic amplitudes
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(with-sc3
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(lambda (fd)
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(let* ((square
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(lambda (a) (* a a)))
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(nth
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(lambda (i)
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(async fd (b-alloc i 1024 1))
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(let* ((n (expt (+ i 1) 2))
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(a (map (lambda (j)
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(square (/ (- n j) n)))
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(enumFromTo 0 (- n 1)))))
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(async fd (b-gen1 i "sine1" (cons 7 a)))))))
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(for-each nth (enumFromTo 0 7)))))}
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v-osc3 buffers 0 through 7
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(let ((p (mouse-x 0 7 0 0.1))
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(f1 (mce2 240 241))
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(f2 (mce2 240.27 241.1))
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(f3 (mce2 240.43 239.71)))
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(mul (v-osc3 p f1 f2 f3) 0.1))
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reallocate buffers while oscillator is running
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(with-sc3
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(lambda (fd)
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(for-each
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(lambda (i)
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(async fd (b-gen1 i "sine1" (cons 7 (replicateM 16 (lambda () (s:rand 0 1)))))))
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(enumFromTo 0 7))))
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