2. Open PPT and create n new slides, where n is the number of photos.
3. Insert a photo in each slide and resize the photo to match the slide.
4. Click Insert-Movies and Sounds-Sounds in Files. Select music in the dialog box and press OK.
5. Right-click the sound icon and select the Custom Animation button.
6. In the custom animation box, click the inverted triangle icon as shown below and select "Effect Options".
7. In the Effect Options dialog box, click the effect. Select the third option in the Stop Play bar. Enter after n+ 1 slide. N is the number of photos.
8. In the Effect Options dialog box, click Sound Settings and select the option "Hide sound icons during slide show" in Display Options.
9. Click the inverted triangle icon in another task pane in the upper right corner. Select the slide switch.
10. In the dialog box that appears, select the switching effect you like; Cancel the mouse click film changing mode, and choose to change films every m minutes. M is the film changing interval. When you're done, click the Apply to All Slides button. In this way, you're done.