That did it Mac, you're right as usual. I had to root around to find my basic five buck three to two prong adapter and when I plugged the PC into that the noise disappeared. Just as a final test I removed it and sure enough the noise is back. Now, I'll run over to Fry's and get a proper one.

Bob


Biab/RB latest build, Win 11 Pro, Ryzen 5 5600 G, 512 Gig SSD, 16 Gigs Ram, Steinberg UR22 MkII, Roland Sonic Cell, Kurzweil PC3, Hammond SK1, Korg PA3XPro, Garritan JABB, Hypercanvas, Sampletank 3, more.