After inserting an audio file such as a music file within your PowerPoint presentation, do you want to play music that loops continuously in your presentation, without any interruption as you move from one slide to another? You must ensure that the music clip you are using is suitable for this purpose. A soft music clip that spans across your slides can make the flow between slides smooth, as long as the sound is not jarring or distracting for your audience.
Loop an audio clip to play across slides in PowerPoint 2019 for Windows.

