Quote from IrianWoah, that actually fixed it
Thanks guys :p
but does this mean I can't do "left-to-right" headphone sound effects or whatever? Not that I was going to, just curious
No prob, dude. And Stereo means the left and right speakers can be different, so unchecking that mono option actually does let you do left to right sound effects. Keeping it checked is the thing that keeps you from doing that. So you're good.