I am finding: Inserting Music and Audio into a Powerpoint presentation
To add a sound clip to your slide show, perform the following steps:
  1. Display the slide to which you want to add sound.
  2. Use one of the following three methods to insert the sound clip:
    • To browse through the Clip Organizer for a sound clip, on the Insert menu, point to Movies and Sounds, and then click Sound from Clip Organizer.
PowerPoint will display the Clip Art task pane and will select Sounds in the Results Should Be drop-down list. You can use the Clip Art task pane to locate a sound clip stored on your computer or on the Office Online Web site.
    • To insert a sound clip from an existing sound file on a local disk, a shared network location, or an Internet site (if you haven’t imported the file into the Clip Organizer), on the Insert menu, point to Movies and Sounds, and then click Sound from File.
The Insert Sound dialog box will appear. Select the sound file that you want, and then click the OK button.
    • To record your own sound clip (you must have a microphone attached
Insert music/sound file into a PowerPoint
  • Open a PowerPoint file
  • On the Insert menu, point to Movies and Sounds, and then click Sound from File.
  • Click the music or sound file you want to insert and then click OK.
·Tips: Always put the music/audio file in the same folder as your PowerPoint presentation. If you later move the PowerPoint presentation to another computer, copy the music/audio file too. Keeping your music/sound file in the same folder as your presentation ensures the link will still work. However, you should always test the music/audio file on a new machine just to be certain. Re-insert the music/audio file, if necessary.
  • After you click OK, you' are promoted with a message asking how you want the music/audio file to start in the slide show. Choose Automatically.
Set the music as the background music for the PowerPoint
  • Right-click to the loud-speaker icon on the slide, find Custom Animation and click it.
  • Check this added music animation sequence under Custom Animation. Make sure that this added music file is placed in the primary of all the animations sequences. If not, drag it to the primary.
  • Right-click the added music animations sequences and find Effect Options and click it.
  • After click Effect Options, there would a window named Play Sound pop-up.
  • Find Stop playing and check After, and then specify a value bigger than the quantity of the slide quantity of the current PowerPoint file. In other words, if there are 10 slides contained in this PowerPoint file, you have to specify a value >10, 11 or 12.
  • Click Timing tab under the Play Sound window.
  • Find Repeat under this tab, click Drop-down button.
  • Choose the option of Until End of Slide.
  • Click OK button.
The audio file is played as background music from the very beginning to the very end of the PowerPoint. To test the audio effect, clickauto_play.gif icon.
With this function, I am sure that your PowerPoint file would be more amusing and thrilling.