A silent video feels unfinished. The right underscore makes it feel intentional.
Training clips, pitch walkthroughs, product demos, and social explainers often ship without music because finding a track, trimming it, and mixing volume means opening another tool. That friction is why a lot of good videos stay flat.
Vidsembly's AI Soundtrack removes the audio-editing step. Upload an MP4, MOV, or WebM video, pick a mood (or describe a custom sound), preview the mix, adjust music volume, and export the finished video — or download the track alone on Pro and Elite.
When AI Soundtrack Is the Right Tool
You already have the video. Narration and visuals are done; you need music that fits the length.
You want original instrumental music. Mood presets cover cinematic, corporate, upbeat, ambient, lo-fi, and dramatic.
You do not want a DAW. No timeline editing, stem mixing, or royalty scavenger hunt.
You need a quick mix pass. Preview, regenerate, and set music volume before export.
Skip straight to the tool
Upload your video, choose a mood or custom prompt, preview the mix, then export video with music.
How to Add AI Background Music in 3 Steps
Upload your video. Add MP4, MOV, or WebM up to 500 MB. AI Soundtrack reads the clip length automatically.
Choose your sound. Pick Cinematic, Corporate, Upbeat, Ambient, Lo-fi, or Dramatic — or describe a custom instrumental sound.
Mix and export. Preview the video with music, set soundtrack volume, and download the finished MP4 (or the music track alone on Pro and Elite).
Great Pairings With Other Vidsembly Tools
Presentation to Video → AI Soundtrack
Create a narrated deck video with Presentation to Video, then add a corporate or cinematic underscore so the export feels more finished for LinkedIn, LMS, or email follow-ups.
Presentation Agent → AI Soundtrack
After Presentation Agent turns a blog or white paper into a narrated MP4, run the same file through AI Soundtrack for a polished final cut.
Tips for Better AI Music Mixes
Match mood to audience. Corporate for enablement, upbeat for product launches, ambient for explainers.
Keep music under the voice. Lower soundtrack volume whenever narration is the main message.
Regenerate when the first pass feels off. A different mood often fixes tone faster than manual editing.
Export once you like the preview. Treat the mix preview as your quality gate before sharing.
AI Soundtrack vs. Stock Music Libraries
Stock sites still work when you need a specific licensed track. AI Soundtrack is faster when you want original instrumental music fitted to your video length without hunting, trimming, or learning an editor.
Related guide: How to generate a soundtrack that matches your video length
Get Started
Open AI Soundtrack, upload your next silent or voice-only video, pick a mood, and export a mix that sounds finished — without opening an audio editor.
About the Author
Rielly Milne builds conversational AI tools that simplify video creation and production workflows. His background includes large-scale YouTube content and representing the United States at the Paris 2024 Olympics, where he earned a bronze medal.