Sound Across Slides in PowerPoint 2007 for Windows

Follow these steps to loop a music (or any sound) file across slides in PowerPoint 2007 for Windows:

1. Navigate to the slide where you want the sound to begin playing, which is usually the first slide of the presentation. On the Insert tab of the Ribbon choose the Sound | Sound from Files option, as shown in Figure 2, below.
2. 
   Figure 2: Sound from File
2. Doing so opens the Insert Sound dialog box as shown in Figure 3, below. Locate the sound file you want to play, and click the OK button.
3. 
   Figure 3: Insert Sound
3. This action will insert the sound in the slide. Figure 4, below, shows the inserted audio icon that you'll probably find right in the center of the slide. At the same time, PowerPoint brings up a message window asking how you want the sound to start in the slideshow. You can choose the When Clicked option, but Automatically works best. So, go ahead and select Automatically.
4. 
   Figure 4: Play automatically
4. Select the audio icon to activate the Sound Tools Options tab on the Ribbon as shown in Figure 5.
5. 
   Figure 5: Options tab of the Ribbon

Contextual Tabs

The Sound Tools Option tab is a contextual tab. Contextual tabs are special tabs in the Ribbon that are not visible all the time. They only make an appearance when you are working with a particular slide object which can be edited using special options.

5. In the Sound Options group, click to open the Play Sound list, and choose the Play across Slides option from the resultant drop-down list, as shown in Figure 6, below.
6. 
   Figure 6: Play across slides
6. Select the Loop until Stopped option on the Sound Options group as shown in Figure 7.
7. 
   Figure 7: Loop until stopped
7. In all versions of PowerPoint, you might see an audio icon on the slide where you inserted the sound. If you don't like the icon on the slide, just drag it to anywhere off the slide, and your sound shall still play fine.
8. Save your presentation often.