Information:
Sound Card
Intel Display Audio
Sound Interface Devices
Turtle Beach DX 11 (No on-board Sound Card)
On board Mixer plugged in and secure on the back of my tower, plugged in properly.

Problem:
Recently, I began to experience severe audio tearing on Youtube. (Loud repeating of the current part of the song.) I was alt tabbed out, wasn't kicking any wires down near the bottom of my computer or anything. It only happened within Firefox, as my Skype call was unaffected. Is this a solvable/avoidable issue?