Hey Zeppelin Design team! I’m also having some trouble getting sound from my synth. It’s my first kit so it may be user error. I have tried reflowing some of the resistor joints, as they were the first and worst I had soldered (some have a bit too much solder now). I also may have slightly damaged the PCB at the ISP, maybe damaging the MISO, SCK, and RSTI side. Not sure if that can cause issue, if so, is there anything I can do about it? I purchased a USBtiny and flashed the software. I can bridge volume pot pins and get a slight buzz, but I didn’t test it for long. Im attaching some pictures, can you take a look?
Solder Side – https://ibb.co/WnL6bkF
Component Side – https://ibb.co/JcGVJkr