I've got this strange buzzing/interference noise coming from both my headphones or speakers that I can amplify when I whack up the volume from my amplifier. I've noticed it also makes noises that occur whenever I do something on the pc, if it's opening a browser, playing a game or even just moving the mouse (oh what fancy noises they make!).
My setup is shown below.
I've tried replacing the cable going from my PC to the amplifier but this hasn't made a difference. I've also tried moving the sound card around, as well as connecting everything to the same power source. Nothing. The problem still remains.
I'm guessing it's most likely interference but is there any way to reduce/eliminate this?