speech

Hanzo voice on CPU: speech-to-text and text-to-speech behind one OpenAI-shaped surface. One Go binary over sherpa-onnx.

Routes

• POST /v1/audio/transcriptions — multipart file + model (parakeet | whisper) [+ language, response_format json | text | verbose_json, timestamp_granularities[] word | segment]. Any container a browser records.
• POST /v1/audio/speech — {model: kokoro, input, voice, response_format, speed} → mp3 (default), wav, opus, aac, flac or pcm, labelled as what it is.
• POST /v1/audio/transcript, POST|DELETE /v1/audio/transcript/{id} — a transcript that grows as raw pcm16 arrives.
• GET /v1/models, GET /healthz (ready once every model has loaded).

Trust model

No auth of its own, in-cluster only. api.hanzo.ai fronts it through the ai plane, which authenticates and meters every caller; a provider row pointing at http://speech.hanzo.svc/v1 is the whole integration.

Run

MODELS=/path/to/weights go run .

weights.sum names every weight file. Set S3_ENDPOINT, S3_BUCKET and an S3 key to fetch the missing ones at boot; see LLM.md.