This video will show you how to use an oscilloscope to test the voltage of an audio signal, with a focus on arcade board safety. In the past few years, so much equipment has been destroyed by superguns without audio protection and this video will show you how to prevent that from happening in your setup!
Here’s the exact oscilloscope we used in the video: https://amzn.to/2TPwoGv
More information on scopes and testing: https://www.retrorgb.com/oscilloscope.html
Video available on YouTube (above), LBRY and Bitchute: