StarGround: where connect the ground pin of the Volume Pot

[ygg-it]

Do you suggest to connect to a star-point GND the ground pin of the volume potentiometer or to connect it to the local ground, close to the opamp?

I think that connecting it to the star-point you may introduce some output signal into the pot....

But, if you connect it to the local ground you can get hum/Rf noise...

NB: the pot is located between two opamp; it is not directly connected to the input socket...

[Conrad Hoffman]

The pot should be connected to whatever point is the ground reference for the driving and receiving opamps. You don't want it connected to any point that might have a small contaminating signal on it, or should it modulate whatever point it's connected to (ulikely if a high value) IOW, the star point is the likely candidate.