AI Sound Effect Generator for Video

Add synchronized Foley and environmental sound to a silent or existing clip. Upload a video up to 10 seconds, optionally describe the sound direction, and export the same video with a newly generated soundtrack.

Turn Visible Action into Synchronized Sound

Mirelo Video-to-SFX analyzes the uploaded clip and creates audio aligned with the timing of visible movement. Styvid returns a video with the new soundtrack already muxed, so there is no separate audio alignment step.

1. Upload a short video

Choose an MP4, MOV, or WEBM from 1 to 10 seconds. Styvid rejects longer clips instead of silently truncating them, so the visible input matches the duration sent to the model.

2. Guide the sound or leave it open

Describe important materials, impacts, footsteps, mechanisms, weather, room tone, or ambience. The prompt is optional when the visual action already communicates a clear sound.

3. Export video with audio

The model returns the source visuals with a generated SFX track. The completed file is migrated to persistent storage before it appears in the result player.

Prompt the Sounds That Matter Most

A useful sound prompt identifies the acoustic events and environment without asking for unrelated dialogue or a full musical composition.

Name materials and impacts

Use specific phrases such as metal clanging, glass set on wood, gravel footsteps, cloth movement, paper folding, or a soft mechanical click.

Describe the environment

Add acoustic context such as a quiet room, open field, busy street, warehouse reverb, wind through trees, rain against a window, or distant traffic.

Keep speech and music separate

This model is designed for synchronized sound effects, not dialogue replacement or song generation. Use Lip Sync for speech-driven video and a dedicated music workflow for scoring.

Useful for Generated Clips, Foley Drafts, and Social Video

Video-to-SFX can turn mute visuals into a more convincing preview and reduce the amount of manual sound searching needed for a short edit.

AI-generated video

Add motion-aware sound to generated product shots, cinematic concepts, fantasy scenes, and character actions that were delivered without usable audio.

Rapid Foley concepts

Create a synchronized first pass for impacts, movement, machinery, handling sounds, and ambience before a final sound designer refines the mix.

Short-form social edits

Give a short reveal, process clip, visual gag, loop, or product moment an immediate sound layer for review and platform-ready editing.

FAQs

AI Sound Effect Generator FAQ

Input, soundtrack, and output details for video-to-SFX.

This workflow accepts videos from 1 to 10 seconds. The underlying model truncates longer inputs, so Styvid blocks them first to keep the requested source and generated result predictable.

No. The prompt is optional. Use it when the video contains several possible sounds or when a particular material, impact, ambience, or acoustic style matters.

No. The current result is the uploaded video with a generated sound-effects track already added, matching the model's native output.

The model is intended for SFX and synchronization rather than speech or music. Use a speech workflow for dialogue and a music generator for a composed soundtrack.

Yes. Choose from 1 second up to the source duration, with a maximum of 10 seconds. The default follows the uploaded clip length.

Add Motion-Aware Sound to a Short Video

Upload a clip and create a synchronized SFX version ready to preview and download.

Generate Video Sound Effects