I'm considering making a Modular Synth module which would pan and modulate a stereo signal. So an electronic circuit to pan the audio from right to left, even allow audio signals crossing over, Left to Right, and back. Given it's for a Modular synth module it'd be Voltage controlled.
I'm not even sure where to start. It might be easier to just go digital and have a micro-controller control things. Analog I'd imagine I need to create two copies of Left and Right signal inputs, so you'd have Left_A and Left_B, and similarly for the Right signal. Those four signals would be amplitude modulated and then summed together again to the Output.
So LeftOutput = (? * Left_A) Plus (? * Right_A) and RightOutput = (? * Left_B) Plus (? * Right_B)
I guess I need four voltage controlled amplifier/attenuator circuits and a two adders.
I'm not an electronics expert so is that possible, sane, the easiest solution?