[sdiy] VC distortion?

[John Mahoney]

At 12:20 AM 11/29/2006, gerald stevens wrote:
>Hello,
>
>I have been thinking about using vactrols to add voltage control to a
>distortion pedal.  Looks like my grunge pedal requires pots and not
>variable resistors.  I imagine you could build a voltage controlled pot
>using two vactrols, one with an inverted level sent to an LED - has anyone
>done this?  I have also seen tech notes on using digital pots in pairs to
>create voltage controlled pots, but most digital pots are surface mount
>these days, and too much caffeine precludes the use of such tiny components.

Why not use a VCA in front of the distortion unit?


>Has anyone taken the PAIA quadrafuzz and modified it for modular synth use?
>Know of any other voltage controlled distortion circuits online?

I've got an old Q'fuzz and I've only just thought of using it with 
the modular. I'll have to see what kind of signal levels it likes; it 
does have a "Line" setting but that's probably for 1 or 2 volts 
p-to-p. It does not have any voltage-controlled features, though.
--
john