With PowerPoint 2013, you can add sound to your presentation such as including narration or applying sound effects to specific slides. You can add audio to your presentation three ways: on the Insert tab, in the Media group, use the Audio tool; on the Slide Show tab, in the Set Up group, use the Record Slide Show tool to record narration and other settings for your slide show; or, on the Transitions tab, in the Timing group, add sound effects by using the Sound tool.
Display the slide for which you want to begin audio playback.
Click the Insert tab.
In the Media group, choose Audio.
Select Record Audio.
The Record Sound dialog box opens.
Type a name for the new sound clip.