You can advance slides one after the other, and PowerPoint prompts you to save the timings. To play an audio clip continuously until stopped rather than just playing onceselect Loop Until Stopped.
On the View menu, click Normal. For Dummies: The Podcast. When Loop Until Stopped is used in tandem with Play Across Slides, the looping sound continues throughout the presentation. Set the playback options On the slide, select the audio clip icon. Note that the audio icon is always visible unless you drag it off the slide.
Hide the Audio icon Click the audio clip icon. At the end of the show, you decide whether to keep the timings. An audio icon.
When you are finished, click Stop.