How to add background sound/music to your slideshow

Manipulation to insert a sound into a slide show with PowerPoint 2007 is quite simple.
Open the PowerPoint desired slideshow or create a new slide

Insert the audio file

Press insert and select menu sound, then click 'from an audio file'

A window will appear and asks you to select the audio file which you choosed to insert to slideshow.

Select the slide from the music

Once the file is selected, a second window appears, asking "How would you like the sound appears in the slideshow? "
- Click on "Automatically" for the sound that runs from the beginning of the slideshow
- Select "click" if you want the slide show begins when you click in the slideshow.
So that the music continues throughout the slideshow, click the item "Loop until stop" in the "Sound Options"

Finally, to hide the sound icon on the slide show, click "Hide during slideshow" in the "Sound Options".

Well, you just inserted background music/sound in your slideshow!