Play multiple sounds simultaneously During a presentation, you
might want to have a music playing in the background, then have
additional sound effects. The problem is, when the sound effect
starts to play, your background music stops. What we want is to
have multiple sounds playing at the same time in PowerPoint.
Unfortunately, when one starts, the other stops. Here's why:
When you have multiple sounds embedded, PowerPoint will only
allow one sound to be played at a time. On the other hand, if
you have the sounds linked, it will be able to play
simultaneously. Thus, if you have two sounds, the solution is to
have one of them linked instead of embedded. For instance, you
can have either both the background music and sound effect
linked, OR, have the background music embedded while the sound
effect linked. Microsoft has addressed the issue here, including
detailed steps on how to go about doing it: "Background sound
stops playing in a presentation when the presentation reaches a
slide that uses built-in custom