[sdiy] State Var Filter with Nonlinear Feedback

[Scott Gravenhorst]

Added the 1meg pot.  Much improvement.  I can now easily
find settings where harmonics are added, but that full 
blown random chaos is not present.  I can get that too, 
but I'm more interested in the stable waveforms.  Also,
at least 3 of the nonlinearities I've played with don't
'sound' much different.  I will probably settle on the
one I find with the widest range of stable settings.

NOW it's time to hook up to a synth.

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-- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
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