Add Sound to Video

Upload a video and a music, narration, or sound effect reference, then use @ and a prompt in VideoAI to add sound to video online as a new MP4.

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Creator workspace with video, audio reference, @ assignment, and MP4 preview

Add Sound to Video With Clear Direction

VideoAI keeps the workflow simple: provide the source video, identify each reference, describe the role of the sound, then review the generated version.

Uploaded video beside music narration and sound effect reference files

Step 01

Upload your video and sound reference

Start with the video you want to shape. Add a music file, recorded narration, or sound effect that you have the right to use, so VideoAI has both the picture and the sound reference for adding sound to video.

Prompt box showing @ video and @ audio assignments for sound direction

Step 02

Assign each asset with @

Use @ to mark which file supplies the video and which file carries the music, narration, or sound effect role. Write the prompt around the viewer decision, such as mood, pacing, or how the sound should support the action.

Generated MP4 preview with 4K export and aspect ratio choices

Step 03

Generate, review, and download MP4

VideoAI creates a new video with sound. Preview the result, continue refining it with text instructions, and download an MP4 up to 4K in 16:9, 9:16, 1:1, or 4:5.

When creators add sound to video

Use VideoAI when the sound choice needs to support a clear creative goal, not just sit beside the picture.

Give a short clip a clear mood finished video scene

Give a short clip a clear mood

A reel or campaign cut often needs one sound direction before it feels ready. Upload the clip and a music reference, then describe the mood and rhythm you want the new version to carry.

Add narration to explain a product finished video scene

Add narration to explain a product

For demos, tutorials, and explainers, a recorded narration reference can guide the spoken layer. VideoAI uses your @ assignments and prompt to create a version where the voice supports the visual sequence.

Match sound effects to a reveal finished video scene

Match sound effects to a reveal

When an action, transition, or product reveal needs impact, use a sound effect reference and describe its purpose. The generated result gives the moment a clearer audio cue for the viewer.

Prepare MP4 delivery with sound finished video scene

Prepare MP4 delivery with sound

For add sound to mp4 requests, shape the sound direction, review the generated result, and download an MP4 version for client, social, or campaign delivery.

Who should add sound to video

Creator uploading personal video and audio references into VideoAI

Creators with their own references

Use VideoAI when you already have a video and a sound file in mind. Your prompt tells the model whether that reference should work as music, narration, or a sound effect.

Control the Sound You Add

VideoAI focuses on creator decisions: which assets matter, what role the sound plays, and what deliverable you need after adding sound to video.

Video and sound reference cards prepared for one generation request

Video and sound references together

Bring the video and the sound reference into one generation request. Music, narration, and sound effects can each guide a different creative result, depending on what you assign and describe.

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@ assignments showing video source and audio reference roles

@ assignments for asset roles

The @ method makes your intent explicit. Mark the video source, mark the sound reference, and tell VideoAI how that sound should serve the finished clip.

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Prompt describing BGM feel sound effect style and narration purpose

Prompted sound direction

Describe BGM feel, sound effect style, narration purpose, or music timing direction in plain language. VideoAI uses those choices to generate a new video version with sound.

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MP4 export panel with 4K and four aspect ratio options

MP4 output for delivery

When the result is ready, download an MP4 up to 4K. Choose 16:9, 9:16, 1:1, or 4:5 so the sound version fits the project format.

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Questions before adding sound

To add sound to video, upload your video and audio reference, assign each asset with @, describe the sound purpose, then review and download the MP4 result.

Yes. Generated videos may be used commercially, and you must have rights to any music, narration, or sound effects you upload.

For add sound to mp4 delivery, VideoAI generates a new video that you can download as an MP4 after previewing the result.

The add sound to video online workflow runs through upload, @ assignment, prompt direction, preview, text refinement, and MP4 download.

Your control comes from the audio reference, the @ assignment, and the prompt. Use them to describe the mood, timing direction, narration purpose, or sound effect style you want in the generated version. This workflow is not a manual timeline, mixer, trim, loop, volume, or fade editor.

VideoAI supports music, narration, and sound effects as references. Use @ to identify each sound, then describe how it should support the clip.

You can download an MP4 up to 4K, with aspect ratio choices for 16:9, 9:16, 1:1, and 4:5.

VideoAI exports generated videos without a watermark. Account login is required, and the account includes 10 credits for trying video generation.

One generation can be up to 30 seconds. After that, you can continue working from the generated video and use text instructions for further video extension.
Wide atmospheric background for Create an MP4 With Sound

Create an MP4 With Sound

Upload your video and audio reference, tell VideoAI the role of the sound, and generate a new MP4 version for the project.

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add sound to video - add sound to video online - VideoAI