16 lines
535 B
Scheme
16 lines
535 B
Scheme
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;; (zero-crossing in)
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;; Zero crossing frequency follower.
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;; outputs a frequency based upon the distance between interceptions
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;; of the X axis. The X intercepts are determined via linear
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;; interpolation so this gives better than just integer wavelength
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;; resolution. This is a very crude pitch follower, but can be useful
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;; in some situations.
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;; in - input signal.
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(let* ((a (mul (sin-osc ar (mul-add (sin-osc kr 1 0) 600 700) 0) 0.1))
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(b (mul (impulse ar (zero-crossing a) 0) 0.25)))
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(audition (out 0 (mce2 a b))))
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