Adding Music & Sound
Display the slide to which you want to add music:
Click on Insert | Movies and Sounds.
Choose Sound from Gallery, locate the folder that contains the sound and then double-click the sound you want, or Sound from File and locate a file you have previously saved on your computer.
A sound icon appears on the slide and if you want the sound to play automatically when you go to the slide, click Yes. If you want the sound to play only when you click on the sound icon during a slide show, click No.