What Types of Cables are Susceptible to EMI?

[Al ears]

What??

Please feel very free to explain

 

[Revolutions]

Please feel very free to explain

View: https://youtu.be/yCsfTMk9gKo?feature=shared

 

[riverofwind]

AFAIK it’s more about unwanted noise reaching components like DACs further along the digital chain.

This is what I'm talking about. To remove this effect I hooked up USB power to my UPS and audio signal to digital optical on the computer. I'm curious if using USB power in this way removes the unwanted noise or not, and also the same for digital coax instead of digital optical. Something you might know? Thanks!