hi im new to final cut and something seems to be messed up. None of my audio is playing. its not a question of tracks being muted. not even the previews of video or songs will play before adding them to the timeline. And its not my computer because itunes still plays so i know everything is working on my speakers and computer its just final cut. I think its probably an easy fix like checking a box in preferences but i cant find anything? PLEASE HELP