Unified audio-video generation
Seedance 2.0 generates audio and video jointly from a single unified architecture—enabling millisecond-level synchronization and native dual-channel stereo output with layered tracks (e.g., background music, ambient effects, voiceover), not post-hoc dubbing.
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How to make remarkable videos with Seedance 2.0 – Replicate blog
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Seedance 2.0 doesn’t generate video and then dub audio on top. Audio and video come from the same unified architecture, which means they’re synchronized at the millisecond level.
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