OpenTypeless

Doubao ASR (Volcengine)

Volcengine Doubao ASR uses custom binary WebSocket framing and supports low-latency streaming recognition.

Official API Docs

Volcengine BigModel Streaming ASR

Official streaming API reference for endpoint, headers, and protocol fields.

https://www.volcengine.com/docs/6561/1354869

OpenTypeless Config Example

Fill these values in OpenTypeless settings.

{
  "stt_provider": "volcengine-doubao",
  "stt_api_key": "<app_key>:<access_key>",
  "stt_language": "zh"
}

Common Errors & Fixes

Invalid API key format

OpenTypeless expects stt_api_key as app_key:access_key for this provider.

Handshake succeeds but no text

Ensure binary frame compression/protocol is accepted and audio is 16-bit PCM mono.

Frequent disconnects

Check outbound WebSocket stability and retry under a lower packet-loss network.