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"Thanks mate:)the pitch on the E352 is called tv/oct right??" think so yes.

I can see it's a little unclear, so the idea I'm suggesting with the Maths, is that you use something like TipTop stackcables (seen here http://tiptopaudio.com/stackcable/) and patch the right side function output into, let's say, the E352 CV X, but also into the left side rise or fall or both (it's in between) of the Maths function generator. This means that as the right side function proceeds it will change the behavior of the left side. If you then feed the left function out into let's say E352 CV Y, but also into the right side rise or fall or both, the two functions will be controlling each others behavior in a weird feedback loop, while also controlling different aspects of your oscillator. Attenuverters and offset will let you adjust the range of that feedback and how wild or unpredictable it might get.