Ableton Forum

So I've got a pair of xone k2s going into my mixer (ddm 4000) and I've had a humming in my speakers and tried to isolate it, found that when one if the k2s is plugged into my USB port it's fine, there's no hum. But when i plug the other USB into the other port the humming starts again. I've had a similar problem with my monitor before, giving off a buzz in the speakers? Any advice on isolating the buzz, because as far as I can tell it starts from the USB being plugged in
Cheers

Try unplugging the laptops power cord to see if it goes away, if it does, then it's a grounding issue. There are hum eliminators, google "ebtech xhum"