Markyboard Posted May 22, 2016 Share Posted May 22, 2016 I was having extraneous noise from my PC bleeding into my audio chain and out thru the speakers. This noise was most prominent when mousing around and moving windows or booting up my audio software. Any motion type graphics on web pages added to the cacophony. Most annoying was this periodic ( about every 3 seconds)very short hi pitched bleep that sounded like a chicken being choked off as soon as it starting barking. A couple of years ago I squelched a lot of this type noise by insulating my RME Audio card from the PC chassis with duct tape. But lately that hash (bleeps, squinks and yes, the new 3 second periodic barking chicken) was causing audio havoc again. I believe adding or changing out equipment tends to reroute those ground loops. After many hours of troubleshooting and isolation including swapping PC power supplies to no avail and removing all audio and USB connections from the PC to my audio equipment I could here the blips which told me the PC noise was bleeding in through the AC power. I also tried a couple of those hum eliminators on my mixer, PC and monitor switcher. I also plugged my PC into several different outlets - and still no luck. I finally was able to eliminate this noise by removing the metal bracket from my video graphics card. I'm sure this is all ground loop related but finding that ground loop can be quite challenging. BTW it's not the graphics card itself as I swapped in a different card and got the same noise. Anyway, thought this might help others. Link to comment Share on other sites More sharing options...
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