I am working a geofex type wrapper, with a ground hum eliminator (differential amplifier). I have a TL072 buffer into a 4066 bypass setup (the switching in incomplete) then in to the hum eliminator. I can't see how to bias it though. It seems to me that once it is plugged into another pedal DC current will flow from the bias network to ground. Do I need an output cap there (or two) ?
SND is the send to the effect and RET is the return. VR is the bias voltage from a voltage divider. The SND is shunted to the bias when bypassed.
I will breadboard it tomorrow and see how it goes, but any input is welcomed.