Bytedance Seed Audio 1.0 API | Pricing & Docs

bytedance/seed-audio-1.0/text-to-audio

Generate natural speech and spoken audio from text, reference clips, or an image with Seed Audio 1.0 on RunComfy, with voice presets and adjustable speed, pitch, and output format, available in the browser and via API.

1. Get started

Use RunComfy's API to run bytedance/seed-audio-1.0/text-to-audio. For accepted inputs and outputs, see the model's schema.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/bytedance/seed-audio-1.0/text-to-audio \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "Welcome back to the late-night show. Settle in, pour something warm, and let's ease into the next track together."
  }'

2. Authentication

Set the YOUR_API_TOKEN environment variable with your API key (manage keys in your Profile) and include it on every request as a Bearer token via the Authorization header: Authorization: Bearer $YOUR_API_TOKEN.

3. API reference

Submit a request

Submit an asynchronous generation job and immediately receive a request_id plus URLs to check status, fetch results, and cancel.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/bytedance/seed-audio-1.0/text-to-audio \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "Welcome back to the late-night show. Settle in, pour something warm, and let's ease into the next track together."
  }'

Monitor request status

Fetch the current state for a request_id ("in_queue", "in_progress", "completed", or "cancelled").

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/status \
  --header "Authorization: Bearer <token>"

Retrieve request results

Retrieve the final outputs and metadata for the given request_id; if the job is not complete, the response returns the current state so you can continue polling.

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/result \
  --header "Authorization: Bearer <token>"

Cancel a request

Cancel a queued job by request_id; in-progress jobs cannot be cancelled.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/cancel \
  --header "Authorization: Bearer <token>"

4. File inputs

Hosted file (URL)

Provide a publicly reachable HTTPS URL. Ensure the host allows server-side fetches (no login/cookies required) and isn't rate-limited or blocking bots. Recommended limits: images ≤ 50 MB (~4K), videos ≤ 100 MB (~2–5 min @ 720p). Prefer stable or pre-signed URLs for private assets.

5. Schema

Input schema

{
  "type": "object",
  "title": "Input schema",
  "required": [
    "prompt"
  ],
  "properties": {
    "prompt": {
      "title": "Prompt",
      "description": "Text to synthesize. Cite reference clips in order with @Audio1, @Audio2, @Audio3.",
      "type": "string",
      "default": "Welcome back to the late-night show. Settle in, pour something warm, and let's ease into the next track together."
    },
    "voice": {
      "title": "Voice",
      "description": "Preset voice used for synthesis.",
      "type": "string",
      "enum": [
        "vivi_mixed_en_zh_ja_es_id",
        "mindy_en_es_id_pt_zh",
        "kian_en_zh",
        "cedric_en_zh",
        "sophie_en_zh",
        "jean_en_zh",
        "magnus_en_zh",
        "mabel_en_zh",
        "nadia_en_zh",
        "opal_en_zh",
        "pearl_en_zh",
        "quentin_en_zh",
        "corinne_mixed_en_zh",
        "esther_mixed_en_zh",
        "lyla_mixed_en_zh",
        "tracy_es_zh",
        "sandy_es_mixed_en_zh",
        "felix_zh",
        "celeste_zh",
        "monkey_king_zh"
      ],
      "default": "vivi_mixed_en_zh_ja_es_id"
    },
    "audio_urls": {
      "title": "Reference Audio URLs",
      "description": "Up to 3 reference clips, cited in the prompt as @Audio1, @Audio2, @Audio3. Each clip up to 30s, 10MB, wav/mp3/pcm/ogg_opus.",
      "type": "array",
      "items": {
        "type": "string",
        "format": "audio_uri"
      },
      "maxItems": 3
    },
    "image_url": {
      "title": "Reference Image URL",
      "description": "A single reference image (jpeg/png/webp, up to 10MB). Cannot be combined with audio references.",
      "type": "string"
    },
    "output_format": {
      "title": "Output Format",
      "description": "Output audio container.",
      "type": "string",
      "enum": [
        "wav",
        "mp3",
        "pcm",
        "ogg_opus"
      ],
      "default": "mp3"
    },
    "sample_rate": {
      "title": "Sample Rate (Hz)",
      "description": "Sample rate of the output audio in Hz.",
      "type": "integer",
      "enum": [
        8000,
        16000,
        24000,
        32000,
        44100,
        48000
      ],
      "default": 24000
    },
    "speed": {
      "title": "Speed",
      "description": "Read speed. 1.0 is normal, 0.5 is half speed, 2.0 is double speed.",
      "type": "number",
      "minimum": 0.5,
      "maximum": 2,
      "default": 1
    },
    "volume": {
      "title": "Volume",
      "description": "Output loudness. 1.0 is normal, 0.5 is half, 2.0 is double.",
      "type": "number",
      "minimum": 0.5,
      "maximum": 2,
      "default": 1
    },
    "pitch": {
      "title": "Pitch",
      "description": "Voice pitch shift in semitones. 0 is normal, -12 lowers by one octave, 12 raises by one octave.",
      "type": "integer",
      "minimum": -12,
      "maximum": 12,
      "default": 0
    }
  }
}

Output schema

{
  "output": {
    "type": "object",
    "properties": {
      "image": {
        "type": "string",
        "format": "uri",
        "description": "single image URL"
      },
      "video": {
        "type": "string",
        "format": "uri",
        "description": "single video URL"
      },
      "images": {
        "type": "array",
        "description": "multiple image URLs",
        "items": {
          "type": "string",
          "format": "uri"
        }
      },
      "videos": {
        "type": "array",
        "description": "multiple video URLs",
        "items": {
          "type": "string",
          "format": "uri"
        }
      }
    }
  }
}

RunComfy

RunComfy is the premier ComfyUI platform, offering ComfyUI online environment and services, along with ComfyUI workflows featuring stunning visuals. RunComfy also provides AI Models, enabling artists to harness the latest AI tools to create incredible art.

1. Get started

Use RunComfy's API to run bytedance/seed-audio-1.0/text-to-audio. For accepted inputs and outputs, see the model's schema.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/bytedance/seed-audio-1.0/text-to-audio \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "Welcome back to the late-night show. Settle in, pour something warm, and let's ease into the next track together."
  }'

3. API reference

Submit a request

Submit an asynchronous generation job and immediately receive a request_id plus URLs to check status, fetch results, and cancel.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/bytedance/seed-audio-1.0/text-to-audio \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "prompt": "Welcome back to the late-night show. Settle in, pour something warm, and let's ease into the next track together."
  }'

Monitor request status

Fetch the current state for a request_id ("in_queue", "in_progress", "completed", or "cancelled").

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/status \
  --header "Authorization: Bearer <token>"

Retrieve request results

Retrieve the final outputs and metadata for the given request_id; if the job is not complete, the response returns the current state so you can continue polling.

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/result \
  --header "Authorization: Bearer <token>"

Cancel a request

Cancel a queued job by request_id; in-progress jobs cannot be cancelled.

curl --request POST \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/cancel \
  --header "Authorization: Bearer <token>"

4. File inputs

Hosted file (URL)

5. Schema

Input schema

{
  "type": "object",
  "title": "Input schema",
  "required": [
    "prompt"
  ],
  "properties": {
    "prompt": {
      "title": "Prompt",
      "description": "Text to synthesize. Cite reference clips in order with @Audio1, @Audio2, @Audio3.",
      "type": "string",
      "default": "Welcome back to the late-night show. Settle in, pour something warm, and let's ease into the next track together."
    },
    "voice": {
      "title": "Voice",
      "description": "Preset voice used for synthesis.",
      "type": "string",
      "enum": [
        "vivi_mixed_en_zh_ja_es_id",
        "mindy_en_es_id_pt_zh",
        "kian_en_zh",
        "cedric_en_zh",
        "sophie_en_zh",
        "jean_en_zh",
        "magnus_en_zh",
        "mabel_en_zh",
        "nadia_en_zh",
        "opal_en_zh",
        "pearl_en_zh",
        "quentin_en_zh",
        "corinne_mixed_en_zh",
        "esther_mixed_en_zh",
        "lyla_mixed_en_zh",
        "tracy_es_zh",
        "sandy_es_mixed_en_zh",
        "felix_zh",
        "celeste_zh",
        "monkey_king_zh"
      ],
      "default": "vivi_mixed_en_zh_ja_es_id"
    },
    "audio_urls": {
      "title": "Reference Audio URLs",
      "description": "Up to 3 reference clips, cited in the prompt as @Audio1, @Audio2, @Audio3. Each clip up to 30s, 10MB, wav/mp3/pcm/ogg_opus.",
      "type": "array",
      "items": {
        "type": "string",
        "format": "audio_uri"
      },
      "maxItems": 3
    },
    "image_url": {
      "title": "Reference Image URL",
      "description": "A single reference image (jpeg/png/webp, up to 10MB). Cannot be combined with audio references.",
      "type": "string"
    },
    "output_format": {
      "title": "Output Format",
      "description": "Output audio container.",
      "type": "string",
      "enum": [
        "wav",
        "mp3",
        "pcm",
        "ogg_opus"
      ],
      "default": "mp3"
    },
    "sample_rate": {
      "title": "Sample Rate (Hz)",
      "description": "Sample rate of the output audio in Hz.",
      "type": "integer",
      "enum": [
        8000,
        16000,
        24000,
        32000,
        44100,
        48000
      ],
      "default": 24000
    },
    "speed": {
      "title": "Speed",
      "description": "Read speed. 1.0 is normal, 0.5 is half speed, 2.0 is double speed.",
      "type": "number",
      "minimum": 0.5,
      "maximum": 2,
      "default": 1
    },
    "volume": {
      "title": "Volume",
      "description": "Output loudness. 1.0 is normal, 0.5 is half, 2.0 is double.",
      "type": "number",
      "minimum": 0.5,
      "maximum": 2,
      "default": 1
    },
    "pitch": {
      "title": "Pitch",
      "description": "Voice pitch shift in semitones. 0 is normal, -12 lowers by one octave, 12 raises by one octave.",
      "type": "integer",
      "minimum": -12,
      "maximum": 12,
      "default": 0
    }
  }
}

Output schema

{
  "output": {
    "type": "object",
    "properties": {
      "image": {
        "type": "string",
        "format": "uri",
        "description": "single image URL"
      },
      "video": {
        "type": "string",
        "format": "uri",
        "description": "single video URL"
      },
      "images": {
        "type": "array",
        "description": "multiple image URLs",
        "items": {
          "type": "string",
          "format": "uri"
        }
      },
      "videos": {
        "type": "array",
        "description": "multiple video URLs",
        "items": {
          "type": "string",
          "format": "uri"
        }
      }
    }
  }
}

Generate natural speech and spoken audio from text, reference clips, or an image with Seed Audio 1.0 on RunComfy, with voice presets and adjustable speed, pitch, and output format, available in the browser and via API.

Table of contents

1. Get started

2. Authentication

3. API reference

Submit a request

Monitor request status

Retrieve request results

Cancel a request

4. File inputs

Hosted file (URL)

5. Schema

Input schema

Output schema

Generate natural speech and spoken audio from text, reference clips, or an image with Seed Audio 1.0 on RunComfy, with voice presets and adjustable speed, pitch, and output format, available in the browser and via API.

Table of contents

1. Get started

2. Authentication

3. API reference

Submit a request

Monitor request status

Retrieve request results

Cancel a request

4. File inputs

Hosted file (URL)

5. Schema

Input schema

Output schema

Seed Audio 1.0: Text-to-Audio with Voice Presets & Reference Audio on Models and API | RunComfy

Generate natural speech and spoken audio from text, reference clips, or an image with Seed Audio 1.0 on RunComfy, with voice presets and adjustable speed, pitch, and output format, available in the browser and via API.

Table of contents

1. Get started

2. Authentication

3. API reference

Submit a request

Monitor request status

Retrieve request results

Cancel a request

4. File inputs

Hosted file (URL)

5. Schema

Input schema

Output schema

Seed Audio 1.0: Text-to-Audio with Voice Presets & Reference Audio on Models and API | RunComfy

Generate natural speech and spoken audio from text, reference clips, or an image with Seed Audio 1.0 on RunComfy, with voice presets and adjustable speed, pitch, and output format, available in the browser and via API.

Table of contents

1. Get started

2. Authentication

3. API reference

Submit a request

Monitor request status

Retrieve request results

Cancel a request

4. File inputs

Hosted file (URL)

5. Schema

Input schema

Output schema