Thanks for the input! Will have to do some serious research into this then. As mentioned previously, I don't seem to get any noise from the other USB stuff, including 2 wireless keyboards, but rather the noise seems to be linked to "power options" (win10). When on power saver, I can crank my power amp up and it is dead silent, but as soon as I pick the "balanced" power option, I hear the buzz like sound every time the light on the pc flickers (and sometimes when it isn't flickering). When the power option is set to high performance, the buzz immediately becomes constant.