[sdiy] Questions about Pulse Width Modulation circuits, VCF Cutoff Freq & Resonance controls

[Oakley Sound]

> The modulation input can be anything... an LFO, ADSR, any control
> voltage...
> For max mayhem even another VCO could be used (though uncommon...)

I don't know about uncommon. On the 'quite common' Prophet 5 you can 
route VCO2 to the PW of VCO1.

But thinking about it, it is not that common on other synths, so Harry 
is probably right.

But its a very useful effect. I use it on most of my BIG string patches. 
So its definitely worth allowing for it.

Tony

www.oakleysound.com