01
Spatial Stereo Sound
Sounds come from where they should — left, right, near, far. Other tools just mix everything to the center.
AI Video Sound Generator
PrismAudio: The Smartest
AI Video Sound Generator
Upload any video — PrismAudio listens to every frame and creates the perfect sound effects automatically. Real spatial audio. No editing skills needed.
Speed
0.63s Generation
Quality
Spatial Stereo Audio
Foundation
ICLR 2026 Research
Integration
Works with Sora & Veo3
What is PrismAudio?
PrismAudio is an AI tool that automatically adds sound to your videos. You upload a video - silent or not - and it figures out exactly what sounds should be there, then creates them for you.
Whether it's footsteps on gravel, rain hitting a window, a crowd cheering, or a car engine starting - PrismAudio watches your video like a sound designer would, and builds the audio from scratch to match every moment.
It's built on research accepted at ICLR 2026, one of the world's top AI conferences. What makes it different from other tools? It's the only one that generates real stereo audio - so sounds come from the right direction, not just the center.
Key Features of PrismAudio
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Syncs to Every Frame
The audio matches exactly what's happening on screen, down to the smallest movement.
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Done in Under 1 Second
No waiting around. Most videos are ready in less than a second.
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Works with AI Video
Made a video in Sora, Veo3, Kling, or Runway? PrismAudio was built for exactly that.
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Complex Scenes, No Problem
Multiple things happening at once? Rain + footsteps + traffic? PrismAudio handles all of it.
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Free to Start
Try your first videos for free. No credit card, no account needed.
Hear What PrismAudio Does to Your Videos
Original Video
PrismAudio Output
AI Generated
🧊 Ice Break
CrackStrikeIce
Original Video
PrismAudio Output
AI Generated
🏊♀️ Indoor Swim
WaterGlideRipple
Original Video
PrismAudio Output
AI Generated
🤖 Sora AI Video
MetalImpactEarth
Original Video
PrismAudio Output
AI Generated
⚔️ Action Scene
OpenPourRustle
Original Video
PrismAudio Output
AI Generated
🌊 Packing Tape
UnrollRipPress
Original Video
PrismAudio Output
AI Generated
🗜️ Cardboard Piercing
PressScrapeCraft
Who Uses PrismAudio?
AI Video Creators
I generate videos with Sora and Kling every day. PrismAudio turns them into something I can actually publish.
Filmmakers & Editors
Recording foley takes days. PrismAudio gives me a working draft in seconds that I can refine or use directly.
Game Developers
I use it for cutscene prototypes and environment audio. Fast enough to test in the same session I design.
Content Creators
My Reels and TikToks finally sound as good as they look. One upload, done.
AI Video Creators
I generate videos with Sora and Kling every day. PrismAudio turns them into something I can actually publish.
Try Creator WorkflowFilmmakers & Editors
Recording foley takes days. PrismAudio gives me a working draft in seconds that I can refine or use directly.
See Pro Use CasesGame Developers
I use it for cutscene prototypes and environment audio. Fast enough to test in the same session I design.
Explore Real ResultsContent Creators
My Reels and TikToks finally sound as good as they look. One upload, done.
Start FreeWhy Choose PrismAudio Over Other Tools?
The Only Stereo AI Audio Tool
Every other video-to-audio AI generates mono sound – everything comes out of the center. PrismAudio positions sounds spatially, so things on the left of the screen sound like they're on your left.
Built for Complex Scenes
Most tools struggle when multiple sounds happen at once. PrismAudio was designed from the ground up to handle overlapping events – exactly like real life.
Backed by Real Research
PrismAudio isn't just a product – it's based on a paper accepted at ICLR 2026, one of AI's most respected conferences. That means it's held to a higher standard than most tools you'll find.
How PrismAudio Compares
| PrismAudio | MMAudio | Others | |
|---|---|---|---|
| Stereo Audio | |||
| Spatial Positioning | |||
| Generation Speed | 0.63s | 1.2–2s | ~2s+ |
| Works with Sora | Partial | Varies | |
| Free Tier | Some | ||
| Research Backing | ICLR 2026 | CVPR 2025 | None |
How to Use PrismAudio
Step 1
Upload Video
Upload any video – silent or with existing audio.
Step 2
AI Analyzes Frames
Fill in the sound effect prompt and BGM prompt. Describe the scene, actions, and mood so the AI can generate matching effects and background music.
Step 3
Generates Spatial Audio
Creates synchronized stereo audio matching every moment.
Step 4
Download & Use
Download your video with perfectly matched sound effects.
Creators Trust PrismAudio for Video Sound
Real workflows: spatial stereo, frame-accurate sync, and fast generation for AI video, ads, and editorial—without a dedicated sound team.
Lisa Wang
E-commerce Seller
“Product clips used to go out silent or with generic stock beds. PrismAudio adds believable room tone and motion-matched effects in one pass—buyers finally hear the product the way it feels on camera.”
David Kim
Content Creator
“I publish a lot of Sora and Runway exports. Other tools smashed everything to mono. PrismAudio keeps stereo placement so movement on screen matches where the sound hits—upload, generate, post.”
Rachel Torres
Startup Founder
“We do not have a full-time sound person. PrismAudio gave us launch and explainer audio that syncs to the edit without me touching a DAW. Free tier was enough to prove it before we upgraded.”
Sarah Chen
Marketing Director
“Campaign turnarounds are brutal. Being able to regenerate spatial audio in under a second means we iterate copy and picture without losing days on sound passes. It is now part of every social cut.”
Michael Torres
Film Editor
“I still sweeten in the suite, but PrismAudio is my first pass for complex scenes—rain, traffic, layered FX—already placed in the field. Stereo out of the box beats mono AI dumps I was fighting before.”
Frequently Asked Questions
What is PrismAudio?
PrismAudio is an AI-powered video to audio generator that automatically creates synchronized sound effects for any video. Upload a silent or existing video, and PrismAudio's AI analyzes every frame to generate realistic, spatially-positioned audio that matches exactly what's happening on screen. It was developed by Alibaba's FunAudioLLM team and is based on research accepted at ICLR 2026.
How does PrismAudio generate audio from video?
PrismAudio watches your video frame by frame and identifies what objects, actions, and environments are present. Then it generates matching sound effects with precise timing – so a door slamming sounds exactly when the door closes, not a moment before or after. It also places sounds in a stereo field based on where things appear in the frame.
What makes PrismAudio different from MMAudio?
PrismAudio produces spatial stereo audio – sounds are positioned left, right, near, and far based on the video. MMAudio only outputs mono audio. PrismAudio also handles complex scenes with multiple overlapping sounds better, generates audio faster (0.63s), and is backed by ICLR 2026 research.
Read the full PrismAudio vs MMAudio comparison →Is PrismAudio free to use?
Yes. PrismAudio has a free tier with [X] generations per month – no credit card or account required. Paid plans start at $19/month for creators who need more volume or longer videos.
What video formats does PrismAudio support?
PrismAudio supports MP4, MOV, AVI, WebM, and MKV. It also works with AI-generated video exports from Sora, Veo3, Kling, Runway, and Pika.
How fast is the audio generation?
Most videos are processed in under 1 second. Average generation time is 0.63 seconds – roughly 2× faster than competing tools.
Can I use PrismAudio for AI-generated video from Sora or Veo3?
Yes. PrismAudio was specifically designed and tested with AI-generated video. AI video often contains unusual visual patterns that confuse other audio tools – PrismAudio handles these reliably.
Can I use the generated audio commercially?
Commercial use is available on Starter plans ($19/month) and above. The free tier is for personal and non-commercial use.
Final Step
Ready to give your videos a voice?
No signup required · No credit card · Works with any video format Trusted by AI video creators, filmmakers, and game developers