Choosing the CD tracks that you want to play with your presentation.
To set up tracks, first you insert the CD into the CD drive of the computer. Then:
On the
Insert tab, in the
Media Clips group, click the arrow next to
Sound, and then click
Play CD Audio Track.
Next to
Start at track, select the track you want to start with.
In the
time box, specify at what time within the track to
start playing the CD. The 00:00 setting means the track will start at its beginning.
Next to
End at track, select the track you want to end with. You can end with the same track you started with.
In the
time box, specify at what time within the track to
stop playing the CD. To play the full track, put its full playing time here. (But note that if the slide show ends before the track is finished, the music stops.)
With the settings shown, this CD would start at track 1 and stop at the end of track 4.
After you select tracks, you're prompted to choose how to start the sound (automatically or by mouse click). After that, a CD icon 
shows up in the middle of your slide.
The CD won't play through all the slides automatically. It works with the same sound settings you'd use to play sound files. So, you need to tell PowerPoint that the CD should play across all slides or across a certain number of slides. You'll do this in the practice session.
The CD will stop when the show reaches the end of the last slide that it's specified to play through. If the slide show is set to loop, the CD will resume with its first programmed track when the slide show restarts.
