Adventures with the Tilman modulator

[Martin Czech]

:::Well, the final results are quite spectacular. The duty cycle can be
:::changed from about 10% to 90%. I'm going to be using it in a VCLFO, but
:::it sounds quite good. When you modulate with another LFO, the sound is
:::similar to PWM but not quite. There is also a pronounced change in
:::pitch, more of a phase change I think.

I'm confused...

AFAIK the Tilman proposal is a post processor, i.e.. rides on a
saw given by an independend vco. Thus I can not understand why
you hear a pitch change, ... ahh, say measure a frequency change.
There should be no frequency change at all, until the circuit
fails due to overload. 

Pitch is not frequency...

Is it possible that the changing spectra lead to a changing pitch
sensation? What do you mean by phase change?

And what happens if you cross the 10% (or 90%) border?
I guess the wave form gets confused then...

m.c.