You could always try to find a vintage(rare) Korg MS-01 which would do exactly what you want.

Alain.

--- In korg_mono-poly@yahoogroups.com , "suicidesushi82" <jeppe@...> wrote:
>
> Hello everyone.First post here...
> Okay so i really want to mod the filter cutoff with som kind of
> expression pedal. Does any of you have any experience with this I
> bought a pedal from Moog called EP-2 because it was cheap and I figured
> it would fit with some CV standard that Mono/Poly used. But it didn't
> work. Are any of you useing an expression pedal to modulate the filter
> cutoff And which
> Thanks a bunch.
>