I'm putting together a power point presentation that I have precise audio behind that matches up with when the slides move. However, after I rehearse my timings, the rehearsed time is anywhere between 4-8 seconds shorter than the length of the three minute audio file, and when I go to play the slideshow to check what happened, the slides advance before I had rehearsed them to. In addition, the slideshow is cut off by 4-8 seconds for whatever reason. I have no transitions, just audio in the first slide that plays continuously across the slides.
How can I solve this problem?