Add Sound to Video: Music, Sound Effects and Voiceover for Silent Clips
Silent video does not get watched. Add Sound to Video gives a clip its sound: the AI watches it and lays ambience and foley in sync with the picture in one click, or builds a full score with music cut to the clip's exact length, sound effects on the moments that matter and your voiceover, mixed and levelled.
How It Works
Add the clip: a video from the AI Video Generator, a product shot, a screen recording or any footage up to 2 minutes.
Pick quick or full score. Quick lays ambience and foley in sync. Full score adds music, effects on key moments and your voiceover.
Download the MP4 with sound, mixed and levelled for social, plus the soundtrack on its own.
Two Ways to Add Sound
Quick (5 AI Credits): the AI watches the clip and adds the ambience and foley it implies, in sync with the movement. One price for the whole clip.
Full score: an instrumental music bed cut to the clip's exact length, sound effects placed on the moments that need them, and your voiceover if you write one, all mixed with the music ducked under the voice and levelled to -14 LUFS, the loudness social platforms play at.
Bring Your Own Sound
Make a voiceover in the AI Voice Generator or a track in the AI Music Generator and send it here: it goes under the video in the mix, so one script and one bed carry across every cut.
Who It Is For
AI-generated clips: give a silent clip from the video models the sound its picture implies.
Product and ad videos: a music bed cut to the edit, a pop on the reveal, a voiceover on top.
Social and Reels: sound that matches the picture, so the clip holds attention with the sound on.
Real estate and travel: room tone, birdsong and city ambience under walkthroughs and b-roll.
Pricing
Quick is 5 AI Credits. A full score is priced by its parts: 2 for the AI to watch the clip and plan the sound, 5 for the music bed, 3 for each sound effect, and the voiceover at 1 AI Credit per 100 characters on the Natural and Expressive voices, and 1 per 200 characters on Fast draft. Anything that fails is refunded and the rest still arrives.
Frequently Asked Questions
How long can the video be?
Up to 2 minutes, as an MP4, MOV or WebM.
Will the sound be in sync?
Yes. Quick mode generates sound from the picture itself, so footsteps, impacts and movement land where they happen. In a full score, each effect is placed at the moment the AI saw it.
Can I use the result commercially?
Yes, in ads, videos and social content, online and offline. Every file is tagged as AI-generated in its metadata, so disclosing AI content on YouTube, TikTok and Instagram is simple.