I’ve modded my Arcade1Up as per ETA Prime’s YouTube instructions, but my speaker in the control panel which I have hooked up to a 12V amp is generating very loud buzzing noises, as per this video I made of it:
You will see there is also game sound so it’s not just hooked up completely wrong; I’m just not sure where the loud buzz is coming from.
I did not run here first; I did consult the Googles. Here is what I’ve tried:
Different 3.5 mm audio cable
Same power supply as main controller board
Different power supply from main controller board
Hooking up arcade, computer, and amp power supplies all on different power strips and outlets
Different amp
Ground loop isolator
None of these seems to help. I’m stumped. Any ideas?