http://www.youtube.com/watch?v=8oSDfhzAis0
how these type of mods are done? Its similar to the Earthbound Audio Supercollider BEAST i'd assume.
I'm asuming its some kind of Oscillator thats fed into the circuit and not actually any output feeding back in
Just sounds like the output being fed back to the input to me.
Thats what i thought as well until he tuned the frequency with the potentiometer (actually that might be in a different video of the same mod there are a bunch)