Before opening the Arduino software, wire up the Arduino according to the circuits page using the 8MHz minimalist breadboard circuit but with a 10k pull ... The best practice, but not necessary for ...

the idea is that he can still use the Arduino to reprogram the NVRAM chip when he wants to play around with the sound. We’ve covered some pretty fancy circuit bent instruments here in the past ...

it’s great for a quick-and-dirty circuit diagrams. Not exactly schematics, but [Duckman] has some Arduino pinout diagrams he made using ASCII-art. These could be useful when pasted into source ...