Audio - Everything Fine But Choppy Voices?

everytime i watch a video, whether it be on Internet or vlc, i get this problem that makes every background noise come forward and louder, and the voices are incredibly quiet, when someone does speak the entire audio becomes choppy, like its grinding, this happened last night while i was using vlc just before i started a new episode, now it does it on Internet, even my itunes music is like it, i just get drums and bass.i've tried restarting the computer, even disabling the sound card driver ( i use realtech audio by the by) i've even uninstalled and reinstalled vlc to see if that was a possible fix, but nope, its still the damn same.