Attributed viewpoint
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.
Translations are for reading; original excerpts remain the evidence.
Original excerpt
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.