Killingbeans
Major Contributor
I say to demonstrate, to those who are able to do it, that an audio pc (low noise audio grade linear power supply, fanless, USB reclocker and USB filters) is perfectly useless compared to any other PC when playing a file with a somewhat perfect player of any nature, and regardless of the audio chain!
I assume you own such an "audio PC", since you keep bringing it up?
And you want us to prove that it can't be audibly superior in any scenario whatsoever? How is that productive in any way?
If I claimed that the dodo wasn't extinct and demanded that you should look in every nook and cranny of the globe, to see if you could find one hiding, wouldn't that be an absolutely pointless exercise?
There's always a worst case scenario. But if you have problems with EMI or ground loops, an "audio PC" isn't the answer. Just move the sources of EMI away from the gear that's sensitive to it and use galvanic isolation when needed. Problem solved. If the gear is still audibly affected by these problems after you took the most logical steps to mitigate them, it's probably just really badly designed, and you'd be better off replacing it with something well designed, rather than throwing money at a so called "audio PC".