We have already explored the new Media Browser in PowerPoint 2011 for Mac, and its Photos tab. The second tab within the Media Browser is the Audio tab — this tab allows you to quickly add sounds to your PowerPoint slides. Since PowerPoint 2011 is so well integrated with Mac OS X, the Audio tab displays your iTunes and GarageBand music collections. Similar to the Photos tab, the Audio tab is also divided into upper and lower panes.
Learn about the Audio tab within the Media Browser in PowerPoint 2011 for Mac.

