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I tried switching the inputs and it didn’t resolve the issue. I re-flowed all the joints on the PCB. I double and triple checked the wiring to the switches. The audio output at the volume pot is very low, but if I use the audio tester at other points I can detect the tremolo (but only as a beat, not as an audio signal). Should I scrap the project and start over? I feel like the board is correct but I can’t get to the problem. The LEDs respond to the pots, I’ve switched back and forth so I know it isn’t just the kill switch.

My voltages aren’t perfect, but they aren’t far off of mybud’s.