Hi,
here's how the pinout differs from the single to the dual OPA.
I've added a wiring Plan (from Rainer Böttchers) to see how to wire a complete dual channel C-Moy.
Attachment:
cmoy.png
Attachment:
cmoy_layout.png
The capacitors (and the two resistors R2 and R3 - see last posts - PSU schematic 2 x 4,5V from a 9V cell) in the battery power supply are used to
split the single +9V Battery into an symmetrical and dual voltage ( 4.5V positive and 4.5V negative = V+ and V- ) supply. This rail splitter uses the caps
and the resistors to divide the single 9V voltage from the Battery by equalizing the Bat. positive and Bat. ground between this two caps in the middle of the resistor connection at the caps.
This middle connection becomes the "virtual ground" rail which re-defines the upper cap as positive voltage rail and the lower cap as negative voltage rail.
The divider switches the Battery ground to a negative potential (relative to the divider ground or 0 = zero) and the caps provide the dual symmetric voltages.
A 20K pot shouldn't be an issue...
The 2200uF caps are OK so far. They'll need a little(!) longer to charge, but i don't see any problems. They are used as buffer caps and rail decoupling caps.
The only thing is that the amp will play back the incoming signal a little longer after switching the amp off. Turning off the amp by a power switch is simply delayed...
You could omit them in the amp circuit and use the 2200uF ones in the rail splitter power supply instead. I'd assume that 100uF as rail decouplers in the amp circuit would be enough then...
I hope that helps

.