Adventures with the Tilman modulator

[Martin Czech]

:::Spectrum is a concept that might not exactly fit here. You can try to
:::develop a "spectrum" of a periodical signal from one cycle of your
:::momentary waveform. The fundamental of this spectrum might always
:::be at the same frequeny. (The phase of this fundamental would not
:::be the same for each "snapshot" of the modulated waveform, though.)

Well, I thought maybe there is different harmonics strength for
each new control voltage -it is- so some psycho acoustic stuff
like missing fundamental is happening. This would then also work
for very slow modulation..
I mean different continuos spectra may have slightly different pitch,
in spite of the fact that a frequency meter doesn't say so...

:::
:::Now when you modulate the waveform, a similar thing will happen as
:::with more simple forms of modulation, like FM or PM:
:::The "momentary frequency" and the spectrum are something entirely
:::different.
:::When you just look at the fundamental of the triangle modulation,
:::and neglect the harmonics, it's obvious that there's some angle modulation
:::applied.

Seems to be PM then, slow modulations should have no pitch effect,
the faster the more...

btw.: PWM doesn't sound like pitch changing to me, more like beating,
I thought that ramp modulation (Tilmann modulation, sounds better?)
would sound like muffled PWM?

m.c.