Every AI video workflow used to end the same way: render the clip, then spend an hour hunting for sound. Foley libraries, temp music, a text-to-speech pass for dialogue that never quite matched the lips. Hailuo H3, available on Supervivid today, collapses all of that into a single generation. Describe the scene, and the model produces the picture and the soundtrack together.

Sound as a first-class output

H3 does not bolt audio on after the fact. Picture and sound are generated jointly, which means the relationship between them is causal rather than decorative:

  • Footsteps land when feet hit the ground, and they change texture on gravel versus wood.
  • Dialogue is lip-synced at generation time, with voices that match the character’s age and build.
  • Ambience follows the space — the same street scene sounds different at noon and at 2 a.m.
  • Doors slam, glasses clink, engines rev exactly on the frame where the action happens.

In our testing the effect is uncanny in the best way. A clip of rain on a café window comes back with the low murmur of conversation inside, muffled traffic outside, and the specific patter of water on glass. None of it was individually specified. The model simply knows what that scene sounds like.

Directing the audio

You can steer sound the same way you steer the image — with plain language in the prompt:

Two hikers reach a cliff edge at sunset. Wind, distant birds, no music. One says, quietly: “We made it.”

H3 respects audio directions like “no music”, “muffled, underwater sound”, or “1970s radio quality”. Dialogue in quotes is spoken verbatim. If you leave sound entirely unspecified, the model fills in a natural ambience bed, which you can always mute in the editor if you would rather score it yourself.

Where it fits in the suite

Hailuo H3 sits alongside Seedance 2.5 in the model picker, and choosing between them is straightforward: Seedance currently has the edge on complex camera moves and long shots, while H3 is unmatched when sound matters — dialogue scenes, product demos with voiceover, anything atmospheric. Clips from both models drop into the same timeline, so mixing them within one project works exactly as you would expect.

H3 generations cost slightly more per second than silent models, reflecting the joint audio synthesis. It is available on every plan today, including free daily credits.