Hi, I've been trying to make a bd-2 cline for a while. I have been encountering a weird high frequency noise when turning the volume and/or gain knob pretty high. This issue occurs on the pcb that I have made on kicad. On breadboard there are no issues. Another thing to point out is that the noise goes away if I have a buffered pedal running before this pedal. I am stuck on trying to figure out what the source of this problem is, and I am certain that the tracing on pcb is correct, as I've already made two versions and both seem to have the same issue.
Have a picture of the PCB?
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Yes, here is the board and schematic on KiCAD. Could it be that GND net is connected with trace rather than the zone?