[sdiy] Building an expression pedal for MS20

[Quincas]

An expression pedal is just a potentiometer controled by foot. I use one with my modular all the time. Basically I made a little box with a 9 v battery inside and two jacks. One stereo jack sends 9v to the pedal and receives the attenuated voltage back. That voltage goes through another pot in the box for range control then out the second jack to the modular. Normally I use it to control filter cutoff, lfo or delay speed, etc. fun easy diy project, have fun!

Quincas

Sent from my iPad

> On 25/02/2015, at 6:07, Jean Bender <lofideadbeat at gmail.com> wrote:
> 
> Hi !
> Well, for a musical project, i need to control some parameters from
> the MS20 with an external processor, and that's would be really great
> if it could be controlled by foot.. In order to play with the cv
> inputs cutoff. It should really do the same as when you are manually
> turning a pot..
> A bit like the mod wheel, but for the foot..  An expression pedal like
> should be great, but i would have to build in a lfo ? Or a vco ?
> Would somebody have advices, ideas.. Maybe this kind of project already exist..
> 
> Thanks for you repplies
> Jean
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