Frontend voice picker silently lost Azure voices because /audio/voices
was called without ?model=, so the server fell back to DEFAULT_TTS_MODEL
and only ever returned one model's catalog. /audio/models also hardcoded
a single `auto` alias, so the client could never request a specific
model id even if it wanted to. On top of that, the Azure adapter shipped
only 2 hand-typed voices in voices/azure.json — the rest of Microsoft's
catalog was unreachable.
Fixed in one pass:
- Drop voices/*.json. Every getVoiceCatalog now calls unspeech REST
(backend=microsoft|alibaba|volcengine). Azure proxies Microsoft's live
voices/list; cosyvoice + volcengine use unspeech's embedded catalogs.
- Drop direct upstream provider calls from send(). All three adapters
POST to <UNSPEECH_REST_BASE_URL>/v1/audio/speech with the openai-shaped
body unspeech expects (model: `<backend>/<id>`). Azure SSML still built
on our side so <prosody rate> speed survives — unspeech accepts
pre-built <speak> documents.
- Fail-fast on every voices endpoint: empty ?model= → 400 MISSING_MODEL
(no implicit DEFAULT_TTS_MODEL fallback), only `auto` resolves;
streaming upstream missing → 503; unspeech non-2xx / network err → 502;
malformed body → 502 with grepable message. No silent `{voices: []}`.
- /audio/models lists every LLM_ROUTER_CONFIG.tts.models key + `auto`.
- Frontend providerOfficialSpeech.listVoices passes ?model= and throws
on upstream failure instead of returning [].
- New UNSPEECH_REST_BASE_URL configKV entry (no default, missing → 503).
config-sync subscriber invalidates the voice cache when this key OR
LLM_ROUTER_CONFIG changes.
- Router voice catalog Redis cache covers all providers with per-provider
TTL (azure 6h live, alibaba/volcengine 24h since unspeech embeds them
at build time).
Pending billing-SKU verification: DashScope cosyvoice now goes through
unspeech's WS-internal alibaba backend (was REST `/SpeechSynthesizer`).
Functional output equivalent — confirm bill after deploy, revert via
git history if WS pricing is materially higher.
RainbowBird
615e0441e8