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docs(zonos-gateway): capture the live :8890 gateway stack + emotion-preset system

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Captures the production Zonos TTS path that the repo was blind to: stock ZONOS2
:1920 engine (stacks/zonos-engine) fronted by zonos-gateway:0.2.0 :8890, reached
via the LiteLLM ext-tts alias. Documents the emotion-preset system (neutral/warm/
excited/sad/intense/whisper, the simple preset: caller path), the API, and the
measured real-time cost (calibrated steering free at RTF~0.52, cfg1.5 ~0.625 —
still realtime). Flags the gateway source (~/zonos-gateway on irv-ml1) as not yet
in gitea. Marks stacks/zonos (v0.1 Gradio) dead/superseded. Records the emotion-
lever finding (text-priming flat -> native steering works) in persistent memory.
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vh
2026-07-17 15:56:11 -07:00
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stacks/zonos/README.md
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# Zonos
> **⚠️ SUPERSEDED / NOT DEPLOYED (2026-07-17).** This stack is Zonos **v0.1**
> (Gradio UI + a v0.1 SDK adapter) and is **no longer running** anywhere on the
> fleet. The live Zonos TTS path is **ZONOS2** — see `stacks/zonos-engine`
> (the `:1920` engine) + `stacks/zonos-gateway` (the `:8890` OpenAI-compatible
> gateway with the emotion-preset system, reached via the LiteLLM `ext-tts`
> alias). Kept for history; do not deploy.
Zyphra's expressive multilingual open-weight TTS
([Zyphra/Zonos](https://github.com/Zyphra/Zonos)) — 44 kHz output,
zero-shot voice cloning, and explicit emotion/conditioning controls —