Audio for Muted Video
Upload a silent or muted video clip and let AI generate synchronized sound effects that match what's happening on screen.
Drop a muted video here or click to upload (max 8s)
Your generated audio will appear here
Upload a muted video and click generate to add AI sound
How It Works
Upload a muted video
Use any silent clip up to 8 seconds. MMAudio analyzes the visuals to understand what sounds belong in the scene.
Describe the audio
Optionally guide the AI with a text prompt, or let it infer sounds directly from the video content.
Preview and download
Listen to the synchronized audio with your video, then download the sound track for your edit.
Frequently Asked Questions
What kind of videos work best?
Silent or muted clips up to 8 seconds work best. MMAudio analyzes visual motion, actions, and environments to generate matching sound effects.
Do I need to write a prompt?
No — the model can infer sounds from the video alone. Adding a prompt like "rain on a window" or "car engine revving" gives you more control over the result.
What does the negative prompt do?
The negative prompt tells the model what sounds to avoid. The default is "music" so the output focuses on environmental and action sounds rather than background music.
What format is the output?
The generated audio is returned as a downloadable audio file. You can preview it synced with your original video in the browser, then import it into any video editor.
How many credits does it cost?
Credits scale with your video length, up to 8 seconds. The exact cost is shown on the generate button after you upload a clip.
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