mmaudio.net

Summary: MMAudio is an open source AI model that generates synchronized audio for videos, images, and text prompts. Developed through a collaboration between researchers at the University of Illinois Urbana Champaign, Sony AI, and Sony Group Corporation, it was presented at CVPR 2025 and has become a state of the art solution for video to audio synthesis. The hosted web platform at MMAudio draws approximately 54,700 monthly visits and operates on a freemium model with paid plans starting at $4.16 per month billed annually. The open source repository has earned over 2,200 GitHub stars and is released under the MIT license.

What is MMAudio?
MMAudio is a multimodal audio generation model built around a joint training approach that leverages both audio visual and audio text datasets to create a unified semantic space. Unlike traditional models trained solely on limited video audio pairs, it generates audio that is deeply integrated with a video's contextual elements, analyzing scene composition, motion, objects, and environmental cues to synthesize matching sound effects and ambient audio. The model accepts video alone, text descriptions, images, or a combination of inputs, making it versatile for filmmakers, content creators, and developers. Its V2 release generates 8 seconds of synchronized audio in approximately 1.23 seconds using only 157 million parameters, significantly smaller and faster than competing models that require over 600 million parameters. It outputs high fidelity audio at 44.1 kHz, uses a conditional synchronization module to align audio with video frames at a granular level of 25 milliseconds, and requires roughly 6GB of GPU memory. The hosted platform is positioned as a specialized generator for adding sound to silent video rather than a full audio editing suite, so users who need granular control export the generated audio into a separate editor or DAW.

Verifiable Stats:

1. MMAudio was developed by researchers at the University of Illinois Urbana Champaign, Sony AI, and Sony Group Corporation, and was presented at CVPR 2025.

2. The open source repository has approximately 2,264 GitHub stars, 266 forks, and 10 open issues, with the last commit dated February 23, 2026, according to OSS AI Hub.

3. MMAudio V2 generates 8 seconds of synchronized audio in approximately 1.23 seconds using 157 million parameters, compared to competing models that require over 600 million parameters.

4. The model outputs high fidelity audio at 44.1 kHz and requires roughly 6GB of GPU memory at 16 bit precision.

5. The hosted platform received approximately 54,700 monthly website visits in July 2026, down 6.9 percent month over month, with a global rank of 587,305, according to AI Tools Time.

6. Pricing on the hosted platform includes a Free plan, a Starter plan at $4.16 per month, a Basic plan at $12.49 per month, and an Advanced plan at $24.99 per month, while the Basic tier is also listed at $9.99 per month for 600 generations and the Advanced tier at $29.99 per month for 2,000 generations plus 60 AI video generations.

7. New users receive 10 free credits on login, and each audio generation consumes approximately 3 credits, after which users purchase additional credits or subscription plans.

8. No institutional venture funding, annual recurring revenue, valuation, or disclosed employee count has been publicly reported for the hosted platform, consistent with a research derived open source project that has been productized as a freemium web service.