[music-dsp] re: tube saturation algorithm research

[Citizen Chunk]

ok, i got my integ/diff working. i had a bug in my differentiator:

> diffState = in - diffState;

should have been:

out = in - previousIn;
previousIn = in;

the problem now is that the output blows up when i pass the integrated
signal through the waveshaper. the waveshaper is fine, because i've
tested it on its own. the integ/diff are fine, because i've tested
them on their own. but the combination of integ->waveshaper->diff is
lethal. any thoughts, guys?

== chunk