[sdiy] diy Korg ms20 expander

[rdrake]

all,

i've been asked to build a small expander module for a pal who plays an MS20.  He does noizy drone stuff, primarily live performance, really likes the sound he's got but would like to have a few more options.  

I'm thinking along the lines of: another linear oscillator, a couple LFOs, some kind of wobbulator modulation source (ken stone SuperPsycho LFO, or a barebones 8step sequencer), maybe a VC phaser? a couple of photo-cell CV sources?...  

What would you add to your MS20?

bbob