Estimated generation time 30s-2 min
Seedance 1.5 Pro: Native Video + Audio Generation
No more adding audio in post. Seedance 1.5 Pro generates dialogue, sound effects, and music natively in one pass—perfectly synced from frame one. Cinema-quality video with the audio already built in.
Frequently asked questions
What is Seedance 1.5 Pro?
ByteDance's AI model that generates video and audio together in one pass. No dubbing, no audio syncing—dialogue, ambience, effects, and music are native to the generation, matched to every frame.
How does it keep audio and video perfectly synchronized?
Seedance 1.5 Pro uses a dual-branch architecture that creates audio and video simultaneously, not sequentially. Because both streams are generated together, speech, lip movements, and sound events (like explosions or footsteps) align from the very first frame.
Which languages and dialects are supported for lip-sync?
It supports accurate multilingual lip-sync across languages like English, Mandarin Chinese, Japanese, Korean, Spanish, Portuguese, Indonesian, and Chinese dialects such as Cantonese and Sichuanese.
What can I create with Seedance 1.5 Pro?
Create short films with coherent multi-shot storytelling, polished marketing and product demos with voiceovers, multilingual versions of the same scene with natural lip-sync, and music or dialogue videos with expressive character voices.
What are the key features?
Key features include native audio-video generation, millisecond-precision lip-sync, cinematic camera control (pan, tilt, zoom, truck, orbit), strong character consistency across multiple clips, and improved background stability to reduce warping.
How do I write prompts for best results?
Describe the visual scene clearly, include any camera movement and mood, and specify what audio should be present (dialogue, ambience, music) and in which language or dialect. Keep character details consistent across shots, and use clear reference images for image-to-video when possible.
What are the technical details and output quality?
Seedance 1.5 Pro is built on a Dual-Branch Diffusion Transformer (DB-DiT) with 4.5B parameters and can generate up to 1080p videos with smooth motion. Generation time and credit cost depend on duration and settings—see Pricing for details.
