I just bought a Moog EP-3 Expression Pedal for use on my Novation Peak, I already have both my Peaks pedal inputs in use so I bought the pedal to take advantage of its CV input (which operates in the range of +/- 5v) I thought it would be a simple connection at first but after reading all I could to make sure I get it right, I’m a bit confused.
So my first post here is a question (sorry) but how do I cable this properly?
Hello m911, welcome to the forum.
What is your question exactly? What is that you want to do?
Hi m911,
The confusion comes from not understanding the difference between a Pedal input (Footswitch or Expression) and a CV (Control Voltage) input.
A Pedal input supplies +5v DC of electricity to a switch or potentiometer. The switch’s or potentiometer’s current position then determines how much or how little of that original voltage gets back to the synthesizer.
A CV input is expecting your external device to supply whatever voltage you want to make the destination go to whatever value you want.
Since neither a Sustain pedal or Expression pedal has a built-in power supply, they will not be able to send a control voltage to the Peak’s CV input.
Hope this helps,
Hey guys, I’m really late to getting back here but thank you both.
I’ve had a busy year with synths, I could answer my own question now if I could 
I’ve since bought a few semi-modulars and I’ve been schooling myself like there’s no tomorrow.