

So......
The audio probe helped a lot. Found that audio wasn't even getting to the first resistor in the circuit. So here I found stupid issue one: the diagram on the website has the tip and ring backwards, at least for me. I don't have a TRS cable, so that probably changes the wiring for me. I think.
I followed the audio probe to the very end of the circuit but still wasn't getting any sound out. So here's stupid issue two: I didn't add enough solder on the output wire. Despite it looking ok, it still wasn't a good enough connection.
Thanks all for putting up with my stupidity.... Guess it takes failure and stupid issues to learn more.
The wiring in the documentation is correct. You shouldn't be using a TRS cable, you need a regular mono guitar cable. Tip goes to the input of the board, ring goes to the black wire of the battery snap, and the shield connection goes to the board ground pad. That way inserting a cable into the input jack will turn on the battery (if installed) and pulling it out will turn off the battery. Very standard wiring for pedals with batteries. The power jack is then switched so that the battery is switched out completely when the power supply plug is inserted into the power jack.So......
The audio probe helped a lot. Found that audio wasn't even getting to the first resistor in the circuit. So here I found stupid issue one: the diagram on the website has the tip and ring backwards, at least for me. I don't have a TRS cable, so that probably changes the wiring for me. I think.