Make Sure the File Format Is Supported
If you are not using one of the following supported audio file formats, consider converting it to a recommended format and then reinserting it in the presentation.
The following audio file formats are supported in PowerPoint:
AIFF Audio file, . aiffAU Audio file, . auMIDI file, . mid or . midiMP3 Audio file, . mp3Advanced Audio Coding—MPEG-4 Audio file, . m4a, . mp4Windows Audio file, . wavWindows Media Audio file, . wma
Optimize Media
Optimizing your audio media for compatibility is the best way to resolve audio playback issues when you share your PowerPoint presentation.
Go to File. Select Info. Select Optimize Compatibility. If Optimize Compatibility appears, your media format may have compatibility issues on another device. If it doesn’t appear, there are no compatibility issues and the presentation is ready to be shared. Wait while PowerPoint optimizes your audio. Once it’s done, select Close.
Compress Audio Files
Embedding audio files rather than linking to them will guarantee playback. This increases the size of your presentation, but compressing your audio files helps save space.
Go to File. Choose Info. Select Compress Media. Choose the audio quality option you want to apply and wait while PowerPoint compresses your media files. Select Close when the process is complete.
