Korg Poly800/EX800 Users

> There must be a place further down the line where we can take the full
> audio signal and use that as the modulation source?

How about taking the already filtered output? Some kind of wierd
feedback filtering. 

Mixing noise into filter cutoff will result in something nice, too. I
have this on another synth.

And what about feeding both of those into resonance cv?

But when doing that much wirings, one might have to amplify the
signals with opamps to prevent the CVs from feeding forward into the
audio path or into each other.

But where to intall all those pots?