To upload an audio file to SlideShare, follow the steps below:

• Upload a presentation to SlideShare or use an existing one
• Click on the Edit/Delete link of the presentation
• Click on the Create Slidecast tab
• Click on the Upload mp3 file button
• Select the mp3 file and upload it
• Use the Synchronization tool to sync your audio with the slides

The audio file format must be mp3. This can be commentary or music that will be heard over your slideshow. You can record an mp3 directly on your computer using a variety of free, downloadable software. Make notes to indicate how many seconds into the recording each slide should appear.

You also have the option to copy/paste the link of an already uploaded mp3 audio file on another server to SlideShare. The URL should end with .mp3

Please use only those audio files (or URLs) for which you have the required copyright permissions.