After reinstalling oblivion particular sounds were not working like actor voices when they are talking directly to me, equipping/unequipping, and lock picking. So far nothing I've tried has worked. I've attached a thread from the nexus forums with more details and what has already been suggested for a solution. http://www.thenexusforums.com/index.php?/topic/406016-weird-sound-issues/page__st__10