Generated Demo Videos can include scene voiceover audio and bundled background music.

Voiceover

AI generation may create text-to-speech audio for scenes. Scene settings can edit the script, timing, and audio URL. Editing the script does not regenerate its audio, and the editor does not offer a manual voiceover upload or Generate voice control.

Background music

  1. Open the video's background music settings.
  2. Choose one of the bundled tracks and set volume.
  3. Preview the timeline. Playback lowers music beneath voiceover.

Limits

  • Custom music upload is not available.
  • Changing a generated narration script requires a matching audio URL or regeneration through the generation flow.

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