I've had my UX2 for about 6 years now and I use the UX2 as my default playback device and with headphones. Lately, I have been experiencing this annoying and constant throbbing sound. This occurs even without Pod Farm open, without anything but the USB cable plugged in, with the "Phones" input knob all the way off, and with my PC volume muted. When I move the UX2 certain directions or placements on my desk, the throbbing noise decreases temporarily, but usually comes back. I've tried 3 different headphones, I have tried uninstalling and reinstalling the drivers, and I have tried a Focusrite 2i4 so I don't know if it's just faulty hardware at this point, or something else. The throbbing doesn't pick up when recording, but it's super annoying.