Originally Posted By: Mac
Are you saying that merely plugging one end of an audio cable to either an input or an output of the Roland yields this noise?

Are you saying that you can leave that unconnected cable plugged in, but pulling the USB connect stops the noise?

That can't be a Ground Loop if so.

What it might be is an unshielded USB cable, though, or perhaps an unshielded or poorly shielded audio cable.


--Mac


Yes, exactly. Another forum recommended this to someone with a similar problem:

http://www.saelig.com/product/UBUSB1001.htm

And Larry, yes plugging the audio outs from my Kurzweil into the SC and connecting the SC's audio outs to my mixer but unplugging the USB cable is fine either through the SC's headphones or my mixer. It's when I realized that that I unplugged everything but the SC and the USB cable to the PC. I tried two different cables, one is a fairly thick Roland 6 footer that came with the SC and the other is a standard thin 10 footer I use for the printer. I tried both of them in different USB ports with no difference.

Earlier I tried several different audio cables both balanced and unbalanced from a 3 foot shorty and a 20 footer and again no difference with just changing audio cables.

Now I think I agree it's the USB cables themselves so maybe I should either try to find a heavier shielded USB cable or get that Isolater in the link I posted above?

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.