> Play a preset track or your own audio behind your LiveDemo, trim long files and set the volume.

Canonical: https://livedemo.ai/docs/edit-a-livedemo/music/

# Music

Open **Custom → Music** and turn the panel on.

## Pick a track

- **Presets**: **Acid**, **Cruise**, **Pulse**, **Upbeat-rock**, **Escape**, **Future**, **Diskettes**, **Pop-Rocks** and **Famous**. Click play to listen.
- **Upload Audio**: your own MP3 or WAV. Files over 5 MB open a trimmer. Set **Start** and **End** until it says **under 5MB**, then click **Trim & Upload**.

Set **Volume** (0–100%, default 100%) and click **Save**.

## Tips

- Keep music at 20–40% when the demo has a [voiceover](https://livedemo.ai/docs/edit-a-livedemo/voiceover/).
- Browsers only play sound after the viewer interacts with the page, so music starts on the first click.
- Viewers who embed with `disableAudio=true` hear no music or voiceover. See [URL parameters](https://livedemo.ai/docs/share/url-parameters/).

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Next: [Misc settings](https://livedemo.ai/docs/edit-a-livedemo/misc-settings/)