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

[Richard Wentk]

At 21:06 14/12/2005, Harry Bissell Jr wrote:
>LOL...
>
>I was implying audio rate modulation. The Prophet V allows
>VCO2 to be made an LFO.  You CAN do audio rate modulation
>as well, but i fail to see how that would get your string sound...
>unless you wanted that 'string sound from hell'  :^P

It's a standard add-fat technique for analogue.

Technically it's a variant on PM, and if the mod index is low enough and/or 
the oscillators are close enough in frequency it creates a kind of 
freq-dependent chorus/amp mod effect.

It only sounds nasty if you crank everything up to 11 and add lots of 
detuning. ;)

Richard