MMAudio generates sound from the picture. Give it a silent clip and the audio comes back matched to what happens on screen.
MMAudio is video-aware. Instead of describing a sound, you hand it a clip and it generates audio synchronised to the visible action. Footsteps when feet hit the ground, whooshes on fast pans, room tone that matches the space.
It is the fastest way to un-mute AI-generated video from models that render silent (Kling 2.5, Wan, LTX). Generate the shot, run MMAudio over it, done.
At a glance
Type: Video-to-audio (synced foley & ambience)
Input: A video clip (+ optional text hint)
Output: Audio synced to the clip’s action
Pricing: Per second of audio, among the cheapest in the catalog
What it is best at
Audio synced to on-screen action automatically
Un-mutes silent AI video in one pass
Optional text hint steers the sound design
What it costs
From 1 tokens ($0.01) per clip; 2 tokens ($0.02) at the default settings.
Settings
Tokens
Price
4 s
1
$0.01
8 s
2
$0.02
10 s
2
$0.02
Prices come from the live catalog at $0.0100 per token, the pay-as-you-go rate; subscriptions include tokens at a lower rate. The exact price is shown before you generate, and a failed generation is refunded.
Questions
How is MMAudio different from ElevenLabs SFX?
SFX generates a sound from a description; MMAudio generates sound from the video itself, timed to the action. Use MMAudio for whole-clip soundscapes and SFX for specific placed effects.
Which video models need MMAudio most?
The silent renderers: Kling 2.5 Turbo Pro, Wan 2.7, LTX-2, LongCat. Seedance 2.0, Kling v3 and Happy Horse generate their own audio natively.
Can I guide what MMAudio generates?
Yes. An optional prompt hints the style (“rainy street ambience, distant traffic”) while the timing still comes from the clip.