I’ll try to explain my question about the gain knob again. (When I said the word “breakup”, I did not mean about amp distortion breakup. What I meant was that the output of the VPM-1 when the pedal is at the very bottom of it’s range starts to stutter).
What I want is to have the volume pedal at 100%, then use the gain know to turn down the output another 10-20 dB. It seems like the gain know boosts the signal, but does not cut it. I always use the gain knob at it’s lowest setting. I want it to go much lower. I’m guessing that swapping out a couple of resisters on the op amp would drop the overall output.