Reply to Mac Mountain Lion Update Problem

I updated to mountain lion yesterday, and today I went to practice on my s4 and a constant beat was coming out of the speakers. I restarted my computer and the same problem was there. and when i tried to load and play a track it would play at the tempo of the beat. But when I unplugged the S4 traktor played the song with no problem. Anyone have any idea what the problem is?
Thanks