Qwen 3 TTS - Voice Design [1.7B]

POST/v1/run

Qwen 3 Tts Voice Design 1.7b by Alibaba - convert text to natural-sounding speech with AI. Supports multiple voices, languages, emotions, and speaking styles for content creation and accessibility.

Request body

Submit an async generation request. The model field selects the model; other fields are model-specific input parameters.

stringmodelrequired

Model identifier. Set to alibaba/qwen-3-tts/voice-design/1.7b.

Default: alibaba/qwen-3-tts/voice-design/1.7b

stringpromptrequired

Optional prompt to guide the style of the generated speech.

Optional<string>text

The text to be converted to speech.

Optional<number>top_p

Top-p sampling parameter.

Range: 0 to 1

Default: 1

Optional<integer>subtalker_top_k

Top-k for sub-talker sampling.

Range: 0 to ∞

Default: 50

Optional<integer>top_k

Top-k sampling parameter.

Range: 0 to ∞

Default: 50

Optional<number>subtalker_temperature

Temperature for sub-talker sampling.

Range: 0 to 1

Default: 0.9

Optional<number>subtalker_top_p

Top-p for sub-talker sampling.

Range: 0 to 1

Default: 1

Optional<string>language

The language of the voice to be designed.

Allowed values: Auto, English, Chinese, Spanish, French, German, Italian, Japanese, Korean, Portuguese, Russian

Default: Auto

Optional<integer>max_new_tokens

Maximum number of new codec tokens to generate.

Range: 1 to 8192

Default: 200

Optional<number>temperature

Sampling temperature; higher => more random.

Range: 0 to 1

Default: 0.9

Optional<boolean>subtalker_dosample

Sampling switch for the sub-talker.

Default: true

Optional<number>repetition_penalty

Penalty to reduce repeated tokens/codes.

Range: 0 to ∞

Default: 1.05

Response Schema

The submit endpoint returns an accepted generation task. Poll the result endpoint with the returned id for terminal outputs or errors.

Optional<string>error

Error message if the task failed. Empty on success.

stringidrequired

Unique identifier for the generation task.

Optional<string>model

Model ID used for the prediction.

Optional<array>outputs

Array of generated content. Empty when status is not completed.

stringstatusrequired

Status of the task: pending, running, completed, failed, or timeout.

Allowed values: pending, running, completed, failed, timeout

Model capabilities

array<string>capability_tagsrequired

Capabilities declared by the model registry.

Default: text-to-speech

stringexecution_moderequired

Execution mode declared by the model registry.

Default: async

# 1. Submit a generation request
curl -X POST https://api.sandbase.ai/v1/run \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "alibaba/qwen-3-tts/voice-design/1.7b",
  "prompt": "Speak in an incredulous tone, but with a hint of panic beginning to creep into your voice.",
  "text": "It's in the top drawer... wait, it's empty? No way, that's impossible! I'm sure I put it there!"
}'

# 2. If the response is still running, poll the returned id
curl https://api.sandbase.ai/v1/run/run_abc123 \
  -H "Authorization: Bearer $SANDBASE_API_KEY"

Response202 Accepted

{
  "id": "run_abc123",
  "model": "alibaba/qwen-3-tts/voice-design/1.7b",
  "status": "running",
  "outputs": []
}