Dia2 2B

Identifier for the type of task being performed

UUID v4 identifier for tracking tasks and matching async responses. Must be unique per task.

Audio output type.

Specifies the file format of the generated output. The available values depend on the task type and the specific model's capabilities.

• `MP3`: Compressed audio, smaller file size.
• `WAV`: Uncompressed, high-quality audio.
• `FLAC`: Lossless compression.
• `OGG`: Open-source compressed audio format (Vorbis codec).

Audio encoding settings for controlling the bitrate, number of channels, and sample rate of the generated audio. Only applicable for lossy output formats (MP3 and OGG). When using lossless formats (WAV or FLAC), this parameter must not be provided.

The available sample rates and valid bitrate ranges depend on the output format. For OGG, bitrate limits also vary by the number of channels.

Specifies a webhook URL where JSON responses will be sent via HTTP POST when generation tasks complete. For batch requests with multiple results, each completed item triggers a separate webhook call as it becomes available.

Determines how the API delivers task results.

Specifies a URL where the generated content will be automatically uploaded using the HTTP PUT method. The raw binary data of the media file is sent directly as the request body. For secure uploads to cloud storage, use presigned URLs that include temporary authentication credentials.

Common use cases:

• Cloud storage: Upload directly to S3 buckets, Google Cloud Storage, or Azure Blob Storage using presigned URLs.
• CDN integration: Upload to content delivery networks for immediate distribution.

// S3 presigned URL for secure upload
https://your-bucket.s3.amazonaws.com/generated/content.mp4?X-Amz-Signature=abc123&X-Amz-Expires=3600

// Google Cloud Storage presigned URL
https://storage.googleapis.com/your-bucket/content.jpg?X-Goog-Signature=xyz789

// Custom storage endpoint
https://storage.example.com/uploads/generated-image.jpg

The content data will be sent as the request body to the specified URL when generation is complete.

Time-to-live (TTL) in seconds for generated content. Only applies when outputType is URL.

Include task cost in the response.

Number of results to generate. Each result uses a different seed, producing variations of the same parameters.

Voice reference audio samples for speaker cloning (UUID, URL, or Base64). The first audio provides the voice for lines tagged [S1] in speech.text, and the second for [S2]. Internally transcribed with Whisper for alignment.

Identifier of the model to use for generation.

Prompt to guide what to exclude from generation. Ignored when guidance is disabled (CFGScale ≤ 1).

Random seed for reproducible generation. When not provided, a random seed is generated in the unsigned 32-bit range.

Guidance scale representing how closely the output will resemble the prompt. Higher values produce results more aligned with the prompt.

Settings for speech generation.

Sampling temperature for text token generation. Lower = more coherent, higher = more variety. 0 = greedy decoding.

Sampling temperature for audio token generation. Lower = cleaner audio, higher = more expressive. 0 = greedy decoding.

Whether to include prefix audio in the final output or trim it.

Top-K sampling for both text and audio tokens. Limits selection to K most likely tokens per step.