Exponental/Linear Modulation of Phase, + new circuit idea

[Don Tillman]

I finally read Sean's phase modulation discussion...

I think SC is building a basic DSP implementation of an all pass
filter stage.  Very basic, because the modulation source isn't
modulating the tuning frequency, it's modulating the DSP coefficients
directly, bypassing the z-tranform.

This will make the modulation nonlinear, especially at the high end of
the range.

Translating this experiment to the analog domain (where we can picture
it better) I think SC is saying that he likes the phase modulation
sound of wrapping the modulation voltage followed by this nonlinear
effect of the missing z-tranform.

  -- Don