AI Video with Sound

Which SeaDance models generate sound?

All seven video models currently sold on SeaDance generate output with sound enabled. The Seedance family and MiniMax H3 family use fixed audio generation. Kling 3.0 also runs with sound enabled in the live SeaDance workflow. Choose a model for its available picture settings and your creative brief; sound is not a separate uploaded asset in this workflow.

According to ByteDance’s Seedance 2.0 overview, the model jointly generates audio and video. According to Kuaishou’s Kling 3.0 announcement, Kling supports native audio generation. Those statements provide background for audiovisual prompting. SeaDance’s actual model choices, output settings and prices are the ones below, regardless of broader capabilities described by the developers.

Dollar estimates allocate purchased credits at Basic monthly: $29.90 for 149 credits, approximately $0.2007 per credit. They are not separate checkout prices. New accounts start with 0 credits. Check pricing before submitting; each quote below covers one result.

Every video in this table is 16:9 and contains one result per request. A different resolution is not a separate selectable upgrade within these model entries. Start from the available Text to Video or Image to Video workflow and keep the sound brief consistent with what the scene shows.

Write ambience as a physical part of the setting

Name a believable source rather than asking for “immersive audio.” For an empty greenhouse, the useful details might be rain on the roof, a gentle ventilation fan, and footsteps along the aisle. State which sounds are close and which remain distant. This gives the scene an acoustic perspective without requiring the camera to visit every sound source.

Original ambience example: “A gardener walks slowly through a greenhouse. Soft rain taps the glass roof; nearby footsteps are clear, while a ventilation fan hums quietly in the distance. Keep the atmosphere calm, with no speech or music.” This is a suitable starting brief for a quiet observational scene. The request for no speech is an instruction, not a guaranteed mute control.

Tie sound effects to visible events

For a product action, describe the event that causes the sound. A lid clicks when it closes; a cup touches the saucer; paper rustles as it is folded. Avoid adding a large sound effect to every camera movement. Camera travel and object action are separate ideas, and an unnecessary audio cue can distract from the event you want viewers to understand.

Original effects example: “Locked view of a ceramic cup placed gently on a wooden desk. A soft contact sound occurs as the base meets the surface, followed by quiet room ambience. No dramatic impact or voice.” Review whether the effect feels connected to the visible contact. If it arrives at an awkward moment, simplify the action and remove competing sounds in the next brief.

Describe music by its role

A useful music brief specifies instrumentation, mood and prominence. For a relaxed product scene, ask for understated instrumental texture under the visible action. For an energetic scene, describe a firmer pulse without requiring a complicated sequence of precise musical changes. Use original musical descriptions and material you have rights to use; do not ask the model to reproduce a commercial recording.

Original music example: “A travel mug rests beside a notebook in morning window light. Quiet plucked strings provide a warm instrumental background, with no vocals; keep the cup placement sound easy to hear.” The music supports the scene rather than replacing it. If the result feels too busy, remove an instrument or ask for ambience alone before increasing the visual complexity.

Keep dialogue short and identify the speaker

Write the exact intended line in quotation marks, name the speaker, and describe the delivery. A single visible speaker suits an initial test because ownership of the words is clear. Keep the line short enough to sit naturally inside the selected duration, with time for a visible reaction. Exact pronunciation and synchronization still need listening and visual review.

Original dialogue example: “A shopkeeper faces the camera beside a shelf of handmade bowls. In a calm English voice she says, ‘This bowl is ready for your table.’ Quiet shop ambience stays behind her voice; no background singing.” At 5 seconds, an even shorter line may suit the scene. At 10 or 15 seconds, leave breathing room instead of filling every moment with speech.

Sound input and silent-output limits

SeaDance does not support uploading an audio file to guide a generation. Describe ambience, music and speech in text. A sound request cannot turn an unsupported upload into a supported input, and a developer’s demonstration of additional inputs does not establish that they are available here. Use only the image upload controls exposed by the selected mode.

Kling’s calculator contains a lower sound-off schedule, shown below for transparency. That schedule is not available on SeaDance as a live generation choice: the workflow keeps sound on. It is not a discount you can activate by writing “silent” in the prompt. Seedance and MiniMax H3 audio is fixed, so there is no corresponding sound-off price selection for those families.

Review picture and sound together

Listen for unwanted speech, distracting music, abrupt effects and unclear words. Watch whether footsteps, contact sounds and mouths match the visible action. Change the brief around the specific failure: simplify speaker turns, reduce overlapping effects, or make music subordinate to the voice. A successfully delivered file can still need a creative revision; generating sound does not guarantee the exact performance you imagined.

When the spoken line comes out different

A frequent complaint from people making talking scenes is that the generated speech does not match the line they wrote, or that the mouth movement drifts away from the words. On SeaDance, sound is generated together with the picture, so you cannot lock a pre-recorded voice track or adjust lip timing inside the generator.

Keep each spoken line short, put the exact words in quotation marks, give one speaker per shot and avoid music or effects under the line. Check the words and the mouth before you use the clip. If exact narration matters, such as a product claim or a name, plan to record your own voiceover in editing instead of relying on generated dialogue.

Frequently asked questions

Sources

ByteDance: Seedance 2.0 · Kuaishou: Kling 3.0 native audio

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Camera movement prompts · Kling 3.0 vs MiniMax H3 · Generation failure guide