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Seed Audio 1.0 is ByteDance’s universal audio generation model, now available as a built-in node in ComfyUI. Unlike traditional text-to-speech systems that only read words aloud, Seed Audio understands the full spectrum of sound. It can generate speech, music, sound effects, ambient atmospheres, and multi-speaker dialogue from a single text prompt.
To use the Partner Nodes, you need to ensure that you are logged in properly and using a permitted network environment. Please refer to the Partner Nodes Overview section of the documentation to understand the specific requirements for using the Partner Nodes.
Make sure your ComfyUI is updated.Workflows in this guide can be found in the Workflow Templates. If you can’t find them in the template, your ComfyUI may be outdated. (Desktop version’s update will delay sometime)If nodes are missing when loading a workflow, possible reasons:
  1. You are not using the latest ComfyUI version (Nightly version)
  2. Some nodes failed to import at startup

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Key capabilities

  • Multi-modal audio generation: Speech, music, sound effects, and ambient audio from one prompt. Describe what you hear, and Seed Audio produces it
  • Voice cloning: Clone voices from up to 3 reference clips (tagged @Audio1, @Audio2, @Audio3 in the prompt) for multi-character dialogue or consistent narration
  • Preset voices: Pick from built-in TTS 2.0 voices when you need reliable, high-quality narration without a reference clip
  • Image-driven voice: Derive a voice from a character image, matching the tone and style to the visual subject
  • Fine-grained control: Adjust speech rate, pitch, loudness, and sample rate independently for each generation
  • Multi-speaker dialogue: Name characters inline in the prompt and Seed Audio handles voice assignment, turn-taking, and emotional delivery
  • Up to 2 minutes per run: Generate extended audio clips suitable for narration, podcast clips, video dubbing, and sound design
With these capabilities, Seed Audio 1.0 fits a wide range of use cases including video voiceovers, multi-character audio dramas, product demos, e-learning narration, game audio prototyping, and accessibility content.

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Available workflows

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Seed Audio 1.0: Text to Audio

Generate audio directly from a text prompt. Describe the voice, ambience, sound effects, and dialogue in the prompt. Seed Audio 1.0 Text to Audio preview

Run in Comfy Cloud

Open in Comfy Cloud

Download Workflow

Download JSON or search “Seed Audio 1.0” in Template Library

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Seed Audio 1.0: Text + Audio to Audio

Generate audio with voice cloning. Connect a reference audio clip and the model clones the voice and style, applying it to your text prompt. Seed Audio 1.0 Text + Audio to Audio preview

Run in Comfy Cloud

Open in Comfy Cloud

Download Workflow

Download JSON or search “Seed Audio 1.0” in Template Library

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Seed Audio 1.0: Text + Image to Audio

Derive a voice from a character image. Connect a character image and the model generates audio with a voice style matching the visual subject. Seed Audio 1.0 Text + Image to Audio preview

Run in Comfy Cloud

Open in Comfy Cloud

Download Workflow

Download JSON or search “Seed Audio 1.0” in Template Library

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How to use Seed Audio 1.0 in ComfyUI

Seed Audio 1.0 ships as the ByteDanceSeedAudio built-in node. You can find it in the node menu under ByteDance.

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Choosing a reference mode

The node offers four reference modes that determine how the generated voice is conditioned:
ModeDescriptionWhen to use
Text onlyDescribe everything (voice style, emotion, ambience, and dialogue) in the promptQuick generation with no reference material
Audio referenceConnect up to 3 reference audio clips (30s max each) and tag them as @Audio1, @Audio2, @Audio3 in the promptCloning specific voices or creating multi-character dialogue
Image referenceConnect one character image; the model derives a voice from itDeriving a voice from a visual character design
Preset voiceSelect a built-in TTS 2.0 voice from the dropdownReliable narration without cloning

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Prompt structure

For best results, structure your prompt to describe the audio scene:
  • Voice and emotion: Describe the tone, age, gender, accent, or emotional delivery
  • Ambience and background: Describe the acoustic environment (quiet studio, busy street, concert hall)
  • Sound effects: Describe specific sounds at the right moment in the timeline
  • Dialogue lines: Write the lines to speak, naming characters for multi-speaker scenes
Example: narration with ambience
A calm, warm male voice speaks confidently. Soft rain falls in the background, with occasional distant thunder. “Seed Audio 1.0 generates natural speech with full control over pacing, pitch, and presence.”
Example: multi-speaker dialogue with audio references
@Audio1 says nervously in a low, fast whisper: “Did you see that?” @Audio2 replies in a calm, slow drawl: “See what? It’s just the wind.” Light wind ambience throughout.

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Parameter tuning

After connecting your inputs, tune these parameters for the desired output:
  • Speech rate: Default 0 (normal). Range -50 (0.5x) to 100 (2.0x). Use negative values for relaxed narration, positive for energetic voiceovers
  • Pitch: Shift in semitones (-12 to +12). Useful for character voices or matching a specific vocal range
  • Loudness: Default 0 (normal). Range -50 (0.5x) to 100 (2.0x). Adjust for consistent volume across different source materials
  • Sample rate: Choose from 8kHz to 48kHz. 24kHz is a good default for speech; 44.1kHz or 48kHz for music
  • Seed: Controls whether the node reruns; results are non-deterministic regardless of seed value

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Edge cases and limitations

  • Reference clip duration: Audio reference clips are limited to 30 seconds each. For longer reference material, trim or edit the clip before connecting
  • Audio reference ordering: Reference inputs must be connected sequentially (1, 2, 3) without gaps
  • Tag limit: A maximum of 3 @AudioN tags are supported in a single prompt
  • Character limit: Prompts are limited to 3000 characters
  • Duration limit: Maximum 2 minutes of audio per run

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Get started

  1. Update ComfyUI to the latest version
  2. Add the ByteDanceSeedAudio node from the node menu, or open one of the workflow templates above
  3. Choose your reference mode and connect inputs
  4. Write your prompt describing the audio scene and dialogue
  5. Run the workflow