Sound or music files can be saved on your computer in many formats that can be used in PowerPoint 2010, such as MP3 or WAV files. You can add these types of sound files onto any slide
in your presentation. However, only WAV type sound files can be embedded
into your presentation.
Read more on Adding Music or Sound in PowerPoint 2010
More on Sound in PowerPoint
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Quick Fixes for PowerPoint Sound and Photo Problems