Trim a video, music clip, or sound clip in PowerPoint
Trim a music clip or sound clip. Select the audio clip on the slide. Once the audio clip is selected, an Audio Tools section appears on the toolbar ribbon, and it has two tabs: Format and Playback:
Play music across multiple slides in your slide show
You can add a song to a presentation and play it across slides in the background of your slide show. If you want to use music from the web, you have to download it to your computer before you can use it in a presentation. On the Insert tab, select Audio, and then Audio on My PC.
Add or delete audio in your PowerPoint presentation - Microsoft …
To add music or other audio clip to your slide show, select the slide you want and click Insert > Audio. You can add audio to a single slide, play audio automatically when a slide appears, or add a song that plays as background music during your entire presentation.
Play music or other sounds automatically when a slide appears
There are different ways to play it automatically when you get to that slide in your presentation: To start the audio after a delayed interval of time that you set, use Animation options. In Normal view (where you edit your slides), click the audio icon on the slide.
Are you having video or audio playback issues? - Microsoft Support
However, if you find that you are having trouble synchronizing the music with the slide show, you can use a third-party audio editing tool, such as Audacity®to string the songs together into one file so they play continuously throughout the slide show.
Add and record audio in PowerPoint - Microsoft Support
Add and record audio, such as music, narration, or sound bites, to your PowerPoint presentation and select the playback options. Add audio from your PC. Select Insert > Media > Audio.
Add closed captions or subtitles to media in PowerPoint - Microsoft …
Beginning with build 16.0.17820.40500, you can generate closed captions for embedded videos in PowerPoint for the web using speech recognition. Additionally, you can translate captions to multiple languages and edit them for accuracy.
Video and audio file formats supported in PowerPoint
Video: .mp4 files encoded with H.264 video and AAC audio. Audio: .m4a files encoded with AAC audio. These names and formats may sound complicated, but you can easily convert to and use these formats without having to know anything more than the names.
Video: Trigger text to play over a video - Microsoft Support
In PowerPoint, you can mark points in a video by using bookmarks, and you can use these bookmarks to trigger animation effects—such as overlaid text. Watch this video to learn how. Trigger text to appear as an overlay on a video. You can …
Video: Trigger an animation effect - Microsoft Support
Triggers give you specific click points for controlling animation, and are especially useful when you want several effects on a slide. Trigger an animation effect to begin when you click it. On the ANIMATIONS tab, in the Advanced Animation group, click Animation Pane.
Create closed captions for a video - Microsoft Support
In PowerPoint for Windows, macOS, and web, you can create closed caption files and add them to the videos or audio files in your presentations. Adding subtitles makes your presentation accessible to a wider audience, including people with hearing impairments and people who speak other languages.