If you watched my previous video, you surely noticed that the sound is very bad. That's not the recording, the sound *is* very bad. I get a lot of clicking, buzzing and droning, even if nothing is playing. I think the clicking may be coming from the wav files not beginning/ending on a 0, and at least part of the buzzing is from my fingers touching the audio in track on the back of the PCB, but there is definitely something more going on.

Needless to say, I would love to get that fixed, so that is the next task. It will possibly involve redesigning the whole audio circuit. Helpful advice welcome.