Until 2026, every major AI video generator produced silent videos. Runway? Silent. Pika? Silent. Kling? Silent. The workflow was: generate silent video -> export to audio tool -> add voiceover/music/sound effects -> re-sync -> export. Five steps that killed the promise of instant AI video.
Seedance 2.0 is the first major model to generate synchronized audio natively in a single API call.
Seedance 2.0's audio is not just background music. The model:
curl -X POST https://api.aiapi-pro.com/v1/video/generations
-H "Authorization: Bearer $KEY"
-d '{"model":"doubao-seedance-2.0",
"content":[
{"type":"text","text":"Barista making latte art, jazz bgm, friendly voiceover"},
{"type":"audio_url","audio_url":{"url":"https://example.com/jazz-ref.mp3"},"role":"reference_audio"}
],
"generate_audio":true,"resolution":"1080p","duration":10}'| Model | Native Audio | Ref Audio Input | Sync Quality |
|---|---|---|---|
| Seedance 2.0 | Yes | Yes (BGM + voice) | Frame-accurate |
| Runway Gen-4 | No | No | N/A |
| Kling 2.0 | No | No | N/A |
| Pika 3.0 | No | No | N/A |
Native audio eliminates an entire post-production pipeline. For applications in e-commerce ads, social media content, educational videos, and game cinematics, one API call now delivers complete audiovisual output.
Native audio means the AI model generates synchronized audio (dialogue, sound effects, ambient sound) alongside the video in a single API call. Seedance 2.0 is the first major model to support this.
No, Runway Gen-4 does not support native audio generation. You need to use a separate tool for audio. Seedance 2.0 is currently the only model with built-in native audio.
Seedance 2.0 uses a multi-modal approach that processes audio tracks alongside video frames during generation. It accepts text, image, video, and audio inputs to create a complete audiovisual output.
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