65 lines
1.6 KiB
Scheme
65 lines
1.6 KiB
Scheme
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;; karplus strong (alex mclean)
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(import (rnrs) (sosc) (rsc3))
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(define a-a
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(list "a-a"
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(list 800 1150 2800 3500 4950)
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(list 0 -4 -20 -36 -60)
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(list 80 90 120 130 140)))
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(define a-u
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(list "a-u"
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(list 325 700 2530 3500 4950)
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(list 0 -12 -30 -40 -64)
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(list 50 60 170 180 200)))
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(define cs
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(lambda (l)
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(append (list-ref l 1)
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(list-ref l 2)
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(list-ref l 3))))
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(define vf
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(lambda (i s)
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(let ((f (in 5 kr i))
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(a (in 5 kr (add i 5)))
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(b (in 5 kr (add i 10))))
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(mix (mul (resonz s f (fdiv b f)) (db-amp a))))))
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(define ugen-if
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(lambda (a b c)
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(add (mul a b) (mul (sub 1 a) c))))
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(define prob-switch
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(lambda (n0 i prob)
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(ugen-if (gt n0 prob) i (neg i))))
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(define ks
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(lambda (n d)
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(let* ((x (mouse-x kr 0 0.01 linear 0.1)) ;; {- delay -}
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(y (mouse-y kr 0.85 1 linear 0.1)) ;; {- blend / gain -}
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(n0 (add (fdiv n 2) 0.5))
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(lagged-delay (lag x 0.01))
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(o (sin-osc ar 200 0))
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(a0 (mul (decay d 0.025) o))
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(a1 (add (local-in 1 ar) (mul a0 (sub y 0.25))))
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(a2 (delay-n a1 0.01 lagged-delay))
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(a3 (delay1 a2))
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(a4 (fdiv (add a2 a3) 2.0))
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(a5 (prob-switch n0 a4 y))
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(a6 (vf (mul (toggle-ff d) 15) a5))
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(a7 (mul a6 1.5)))
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(mrg2 (local-out (mul a5 0.99))
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(out 0 (mce2 a7 a7))))))
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(define karplus-strong
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(lambda (fd)
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(send fd (c-setn1 0 (cs a-a)))
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(send fd (c-setn1 15 (cs a-u)))
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(let ((n (white-noise ar))
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(d (dust kr 4)))
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(play fd (ks n d)))))
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(with-sc3 karplus-strong)
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