{"id":"hkust/mmaudio-v2","object":"model","type":"model","name":"MMAudio V2","creator":"HKUST","modality":"video","tasks":["video-to-audio"],"description":"Adds a soundtrack to a silent video: sound effects and ambience in time with what happens on screen, from a prompt. The result is the start of your video, as many seconds as you ask for (up to 30), with the new sound.","revision":"2026-10-03","version":null,"latest":true,"status":"stable","deprecation":null,"pricing":{"unit":"second","usd":"0.006","overrides":[],"drivers":["duration"]},"cover":{"poster":"https://gpdiatw6a9ifgvnx.public.blob.vercel-storage.com/media/drop/model-covers/mc-mmaudio-v2-forge.poster.d7cceb67.jpg","clip":{"mp4":"https://gpdiatw6a9ifgvnx.public.blob.vercel-storage.com/media/drop/model-covers/mc-mmaudio-v2-forge.web.08f79775.mp4","webm":"https://gpdiatw6a9ifgvnx.public.blob.vercel-storage.com/media/drop/model-covers/mc-mmaudio-v2-forge.1f8a7362.webm","sound":true},"width":1260,"height":720,"alt":"A silent forge clip, given its hammer and sparks, a real run on Leap"},"expected_seconds":307,"input_schema":{"type":"object","additionalProperties":false,"required":["video","prompt","duration"],"properties":{"video":{"type":"string","title":"Video","pattern":"^file_[0-9A-Za-z]{24}$","x-leap-ui":{"group":"main","order":3,"widget":"video","help":"The video to work on: an uploaded file, by ID. Up to 30 seconds."}},"prompt":{"type":"string","title":"Prompt","minLength":1,"maxLength":4000,"pattern":"\\S","x-leap-ui":{"group":"main","order":0,"widget":"textarea"}},"negative_prompt":{"type":"string","title":"Negative prompt","maxLength":2000,"x-leap-ui":{"group":"advanced","order":40,"widget":"textarea","help":"What the image should not contain."}},"seed":{"type":"integer","title":"Seed","minimum":0,"maximum":4294967295,"x-leap-ui":{"group":"advanced","order":50,"widget":"seed","help":"The same seed and input give the same image."}},"duration":{"type":"integer","title":"Duration","minimum":1,"maximum":30,"default":8,"x-leap-ui":{"group":"main","order":12,"widget":"number","unit":"s"}},"settings":{"type":"object","title":"Model settings","additionalProperties":false,"default":{},"properties":{"num_steps":{"type":"integer","title":"Num Steps","minimum":4,"maximum":50,"x-leap-ui":{"group":"advanced","order":30,"widget":"number","help":"The number of steps to generate the audio for."},"default":25},"cfg_strength":{"type":"number","title":"Cfg Strength","minimum":0,"maximum":20,"x-leap-ui":{"group":"advanced","order":31,"widget":"number","help":"The strength of Classifier Free Guidance."},"default":4.5},"mask_away_clip":{"type":"boolean","title":"Mask Away Clip","x-leap-ui":{"group":"advanced","order":32,"widget":"toggle","help":"Whether to mask away the clip."},"default":false}}}}}}