PowerPoint Audio ‘Play Across Slides’ for Background Music: Setup

You want to play a single audio file as background music across all slides in your PowerPoint presentation. The built-in Play Across Slides option lets you do this without inserting the same audio clip on every slide. This article explains how the Play Across Slides feature works and what prerequisites are needed. You will learn the exact steps to set continuous background music for a slideshow.

What the Play Across Slides Option Does

Play Across Slides is an audio playback setting in PowerPoint that lets a single audio file continue playing when you advance to the next slide. Without this option, audio stops as soon as you move to a new slide. With Play Across Slides enabled, the audio plays uninterrupted until it ends or until you manually stop it.

This feature is designed for presentations that need a consistent audio background, such as a music track, narration, or ambient sound. The audio file must be inserted on the first slide of the presentation. You cannot use Play Across Slides with audio inserted on multiple slides — only one audio file can play across slides at a time.

Before setting up background music, make sure your audio file is in a supported format. PowerPoint supports MP3, WAV, M4A, WMA, and FLAC. For best results, use an MP3 file with a bitrate of 128 kbps or higher. Avoid using very long audio files if your presentation is short, because the audio will loop only if you configure it to do so.

Steps to Set Up Background Music With Play Across Slides

1. Open your presentation and go to the first slide
   Background music must start from the first slide. If you insert audio on a later slide, the music will not play on earlier slides.
2. Click Insert > Audio > Audio on My PC
   Navigate to the folder where your audio file is stored. Select the file and click Insert. A speaker icon and a small audio bar appear on the slide.
3. Select the audio icon on the slide
   Click the speaker icon to activate the Audio Tools contextual tabs. The Playback tab appears in the ribbon.
4. On the Playback tab, open the Start dropdown and select Play Across Slides
   This is the key setting. The dropdown is located in the Audio Options group. After selecting Play Across Slides, the audio will continue playing when you advance to slide 2, slide 3, and so on.
5. Check the Loop Until Stopped box if needed
   If your audio file is shorter than the presentation duration, check this box to make the audio repeat from the beginning after it ends. The loop restarts on the current slide.
6. Hide the audio icon during the slideshow
   On the Playback tab, check the Hide During Show box. The speaker icon disappears when you enter Slide Show mode, so it does not distract your audience.
7. Test the audio by starting the slideshow from the first slide
   Press F5 to start from slide 1. Advance through several slides to confirm the audio continues without interruption. Adjust the volume using the audio bar or the Volume dropdown in the Playback tab.

Adjusting How Many Slides the Audio Plays Through

By default, Play Across Slides keeps the audio running until the audio file ends or until you exit the slideshow. To stop the audio after a specific number of slides, use the Animation Pane.

1. Select the audio icon on the slide
   Click the speaker icon to select the audio object.
2. Click Animations > Animation Pane
   The Animation Pane opens on the right side of the window. The audio is listed as a media animation.
3. Right-click the audio entry and choose Effect Options
   A dialog box opens with three tabs: Effect, Timing, and Audio Settings.
4. On the Effect tab, under Stop Playing, select After [X] slides
   Enter the number of slides you want the audio to play through. For example, if you enter 10, the audio stops when you reach slide 11.
5. Click OK to apply the change
   The audio now stops automatically after the specified number of slides, even if the file has not finished playing.

Common Issues and Limitations With Play Across Slides

Audio stops when moving to the next slide

This happens when the Start dropdown is set to On Click or Automatically instead of Play Across Slides. Open the Playback tab, select the audio icon, and change the Start option to Play Across Slides. Also verify that the audio is inserted on the first slide — inserting it on a later slide prevents it from playing on earlier slides.

Audio does not loop even though Loop Until Stopped is checked

The Loop Until Stopped setting works only when the audio file is shorter than the presentation. If the audio file is longer than the slideshow, it will not loop. Trim the audio file to a shorter length using an audio editor, or use a shorter audio clip. Also confirm that the audio is set to Play Across Slides — the loop does not function correctly with On Click or Automatically.

Audio icon appears during the slideshow

The Hide During Show checkbox is on the Playback tab. If the icon still appears, check that you selected the correct audio icon on the slide. If you have multiple audio files, each one must be hidden individually. You can also drag the icon off the slide area to hide it, but this is not recommended because it can cause selection issues later.

Background music stops after a few slides when using transitions

Some slide transitions, especially 3D or morph transitions, can cause audio to stutter or stop. This is a known limitation in PowerPoint. To avoid this, use simple transitions such as Fade or Push. If the problem persists, reduce the audio bitrate to 128 kbps or lower using an audio converter.

Play Across Slides vs Inserting Audio on Each Slide

Item	Play Across Slides	Audio on Each Slide
Number of audio files needed	One file on the first slide	One file per slide
Audio continuity between slides	Continuous — no gap or restart	Restarts on each slide
File size impact	Low — single file	High — multiple copies increase file size
Ease of editing	Change one file, one setting	Update each slide individually
Loop control	Loop Until Stopped option	Each file needs separate loop setting

Play Across Slides is the better choice for presentations longer than 10 slides or when you want seamless background music. Inserting audio on each slide works only for short presentations where you want different audio per slide.

You can now set up continuous background music in your PowerPoint presentation using the Play Across Slides option. Start by inserting an MP3 file on the first slide, then configure the Start dropdown to Play Across Slides and enable Loop Until Stopped if needed. For more precise control, use the Animation Pane to stop the audio after a specific number of slides. To refine your presentation further, explore the Trim Audio feature in the Playback tab to cut the beginning or end of your audio file without leaving PowerPoint.