What platforms does PrismAudio support?

PrismAudio is available on Web App.

What are the limitations of PrismAudio?

Requires you to write sound effect and background music prompts, so results depend on how well you describe the scene. No timeline or per sound editing, so fine tuning means regenerating rather than adjusting individual effects. The free tier is limited to personal, non-commercial use, with commercial rights only from the $19 per month Starter plan.

PrismAudio

Name: PrismAudio
Author: PrismAudio

AI video to spatial stereo sound effects in under a second

Beginner

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Screenshot of PrismAudio, AI video to spatial stereo sound effects in under a second

What is PrismAudio?

PrismAudio turns silent or finished video into synchronised spatial stereo sound effects. Upload a clip, describe the scene, and it generates frame-matched audio in under a second. Built for AI video exports, quick foley drafts and social content.

PrismAudio is a web tool that generates sound effects for video. You upload a clip, silent or already scored, and the system reads the footage frame by frame, works out which objects, actions and environments are present, and builds matching audio from scratch. Footsteps on gravel, rain on glass, an engine turning over, a crowd rising: the model treats the video like a sound designer would and produces the track automatically. The project comes from Alibaba's FunAudioLLM team and rests on research accepted at ICLR 2026. The distinguishing claim is stereo. Most video to audio models output mono, so every effect sits in the centre of the mix. PrismAudio positions sounds across a stereo field according to where things appear on screen, so an object on the left of frame is heard on the left. The company also emphasises overlapping events: rain plus footsteps plus passing traffic in the same shot, rather than one clean sound at a time. Average generation time is quoted at 0.63 seconds. In practice the workflow is a single page. Upload a file in MP4, MOV, AVI, WebM or MKV, write a sound effect prompt and a background music prompt describing scene, action and mood, generate, then download the video with its new audio. There is no timeline, no foley library and no mixing console, which is the point: the tool is aimed at people who need a usable audio pass without opening a DAW. The stated audiences are AI video creators working with Sora, Veo3, Kling, Runway and Pika exports, filmmakers wanting a fast first draft before proper sweetening, game developers prototyping cutscenes, and social content producers. Against alternatives such as MMAudio, the pitch is stereo output, faster turnaround and better handling of busy scenes. Treat PrismAudio as a rapid drafting layer rather than a replacement for a sound team: professional editors in the testimonials still finish work in their own suite. Check the pricing page for current generation limits, since the homepage leaves the free allowance unspecified.

How do you use PrismAudio?

1Open the generator
Go to the PrismAudio generator page. The free tier needs no account or credit card, so you can start with a test clip straight away.
2Upload your video
Drop in a file in MP4, MOV, AVI, WebM or MKV. Silent footage and clips that already carry audio are both accepted, including exports from Sora, Veo3, Kling, Runway and Pika.
3Describe the sound effects and music
Fill in the sound effect prompt and the background music prompt. Name the scene, the actions taking place and the mood so the model knows what to generate.
4Generate the spatial audio
Run the generation. Most clips finish in under a second, with effects timed to individual frames and placed across a stereo field.
5Download the finished video
Preview the result and download the video with its new audio attached. Upgrade to a Starter plan before using output in commercial work.
6Compare against MMAudio before committing
Read the side by side breakdown of stereo output, speed and scene handling to judge whether PrismAudio fits your pipeline.

Pros and cons

Pros

Generates stereo audio with left, right and depth placement instead of a centred mono mixAI
Average generation time of 0.63 seconds makes repeated iteration cheapAI
Handles complex scenes with several overlapping sounds at onceAI
Accepts MP4, MOV, AVI, WebM and MKV, including Sora, Veo3, Kling, Runway and Pika exportsAI
Backed by peer-reviewed research accepted at ICLR 2026 and built by Alibaba's FunAudioLLM teamAI

Cons

Requires you to write sound effect and background music prompts, so results depend on how well you describe the sceneAI
No timeline or per sound editing, so fine tuning means regenerating rather than adjusting individual effectsAI
The free tier is limited to personal, non-commercial use, with commercial rights only from the $19 per month Starter planAI
Homepage never states how many free generations you get per month or the length limits on paid plansAI
No documented API, plugin or editor integration, which rules it out of automated pipelinesAI

How much does PrismAudio cost?

Free trial

The free tier is available without signup or payment details and covers personal, non-commercial use. Commercial rights begin on the $19 per month Starter plan. The monthly generation allowance is not specified on the homepage.

Learn more

Pricing

PrismAudio has a free tier that needs no credit card or account, restricted to personal, non-commercial use. Paid plans start at $19 per month on the Starter tier, which adds commercial usage rights and higher volume or longer videos. The homepage does not state the exact free generation allowance.

Learn more

Integrations

No formal integrations are documented. PrismAudio works with AI generated video exports from Sora, Veo3, Kling, Runway and Pika by accepting their output files directly.

Features

Spatial stereo output with sounds positioned left, right, near and far, plus frame accurate sync and an average generation time of 0.63 seconds. Handles overlapping events in busy scenes, accepts MP4, MOV, AVI, WebM and MKV, and is tuned for AI video from Sora, Veo3, Kling, Runway and Pika. Prompts for sound effects and background music guide each generation.

Learn more

Frequently asked questions about PrismAudio

How much does PrismAudio cost?
PrismAudio has a free tier that needs no credit card or account, restricted to personal, non-commercial use. Paid plans start at $19 per month on the Starter tier, which adds commercial usage rights and higher volume or longer videos. The homepage does not state the exact free generation allowance.
Does PrismAudio offer a free trial?
The free tier is available without signup or payment details and covers personal, non-commercial use. Commercial rights begin on the $19 per month Starter plan. The monthly generation allowance is not specified on the homepage.
How do you use PrismAudio?
The walkthrough on this page covers 6 steps: 1. Open the generator 2. Upload your video 3. Describe the sound effects and music 4. Generate the spatial audio 5. Download the finished video 6. Compare against MMAudio before committing.
What platforms does PrismAudio support?
PrismAudio is available on Web App.
What does PrismAudio integrate with?
No formal integrations are documented. PrismAudio works with AI generated video exports from Sora, Veo3, Kling, Runway and Pika by accepting their output files directly.
What are the limitations of PrismAudio?
Requires you to write sound effect and background music prompts, so results depend on how well you describe the scene. No timeline or per sound editing, so fine tuning means regenerating rather than adjusting individual effects. The free tier is limited to personal, non-commercial use, with commercial rights only from the $19 per month Starter plan.