1. Get the music files you’re going to use into one location. Now insert them into your PowerPoint presentation (from the top menu, choose “Insert, Sound from File…” and locate the track).
2. Right click on the speaker icon for the track and choose “Custom Animation”.
3. Set that option to start on the first slide of the song.
4. Click on the arrow next to the file name in the lower field and choose “Effect Options”.
5. Under “Stop Playing”, insert the number of slides matching the song’s duration.