Building on the kokoro→piper swap (B1), this adds the admin-side
voice management story so additional voices can be installed without
rebuilding the image. The bundled two voices stay as immediate defaults;
everything else is opt-in via a one-click install from the catalog.
Backend (services/voice_library.py):
- fetch_catalog() pulls voices.json from the piper-voices HF repo with
a 24h in-memory TTL. Manual refresh available via ?refresh=1 on the
library endpoint.
- shape_catalog_for_ui() projects the raw HF dict (~250 voices, lots of
nesting) into UI-friendly cards: id, name, language, country, quality,
size, install state. Sorted by language_code then name for stable
display. Install state distinguishes bundled (read-only) from user
(admin-installed, can be removed).
- install_voice() downloads .onnx + .onnx.json into /data/voices with
atomic .tmp → rename so a failed partial download can't leave a
corrupt model around. Idempotent — re-installing an already-present
voice is a no-op.
- uninstall_voice() removes /data voices; bundled /opt voices raise
PermissionError (403 at the route layer).
- Strict voice-id regex prevents path traversal in install/uninstall.
Routes (admin-only, since these write to shared /data and affect all
users on the instance):
- GET /api/voice/voices/library
- POST /api/voice/voices/install
- DELETE /api/voice/voices/<voice_id>
Frontend:
- New "Voice Library" section in Settings → Voice, visible only to
admin users. Collapsed by default; expand to load the catalog
on-demand (doesn't hammer HF for non-admins).
- Free-text filter across id, language code, language name, country,
and dataset name. Refresh button forces a catalog re-fetch.
- Per-voice row shows id, language/country/quality/speaker count, size,
and either an Install button, a Remove button (user voices), or a
"bundled" badge (read-only voices in /opt/piper-voices).
- Installs and uninstalls refresh both the library list AND the active
voice picker so the new voice is immediately selectable.
- VoiceLibraryEntry exported from api/client.ts; new client helpers
getVoiceLibrary/installVoice/uninstallVoice.
Tests:
- Pure-transformation unit tests for shape_catalog_for_ui,
_resolve_file_urls, and the voice-id regex (path-traversal coverage).
- DB/network paths (fetch_catalog, install_voice) need a real
environment — left to CI integration tests or device verification.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Kokoro has been stale upstream since April 2025 (`requires_python<3.13`),
which broke the Python 3.14 build. Piper is the active replacement:
maintained by OHF/Home Assistant, depends only on onnxruntime +
pathvalidate (no torch, no spacy, no transformers), and has cp314
support today.
Dockerfile:
- Add `pip install piper-tts` after the STT install.
- Bundle two default voices (en_US-amy-medium, en_US-ryan-medium) into
/opt/piper-voices at build. Additional voices can be downloaded into
/data/voices via the admin UI (separate commit).
- Image add over the STT-only baseline: ~150 MB.
services/tts.py — full rewrite:
- New voice-discovery layer scans /opt/piper-voices + /data/voices for
.onnx + .onnx.json pairs. /data wins over /opt for the same id so
admin-downloaded voices can override bundled defaults.
- Single PiperVoice kept warm; switches via _switch_voice() when the
user changes their voice_tts_voice setting.
- list_voices() returns metadata read from .onnx.json sidecars (label
derived from filename, language, quality, sample_rate).
- synthesise() uses piper's SynthesisConfig; converts kokoro-shaped
`speed` multiplier to piper's `length_scale` (1.0 / speed).
- `voice_blend` parameter accepted but ignored — piper has no blend
equivalent; first entry's voice is used if anything is passed.
- Dropped: HuggingFace commit-hash tracking (~80 lines), the daily
check_for_kokoro_updates task, voice-tensor blending math.
routes/voice.py:
- tts_backend reports "piper" in /api/voice/status.
- /api/voice/voices no longer requires tts_available() — even with
the active voice failed to load, the catalog still lets the user
pick a different one.
- Synthesise request body dropped the voice_blend field; speed and
voice still supported.
alembic 0047_reset_voice_tts_settings:
- Deletes any stored voice_tts_voice (kokoro IDs that don't map to
piper) and voice_tts_blend (no piper equivalent) rows. Both
re-default cleanly on next read.
frontend:
- VoiceBlendEntry type removed from api/client.ts.
- synthesiseSpeech() signature dropped the voiceBlend parameter.
- SettingsView.vue Voice Blend section removed entirely (slider,
preview, slot management). voice_tts_blend save path removed.
- Default voice id changed from "af_heart" to "en_US-amy-medium".
- VoiceEntry gains optional language/quality/sample_rate fields
from the richer piper sidecar metadata.
Voice paths remain lazily guarded — `VOICE_ENABLED=false` (default)
starts the app cleanly regardless of which TTS deps are present.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
- Route now logs every synthesis request (char count, voice, speed)
- Route logs char count + text preview when the 8000-char limit is hit
- Route logs empty audio with preview (helps spot no-chunk-produced edge case)
- Route logs success with byte count and duration
- Kokoro synthesise() logs per-call: samples produced, elapsed, chars/s
- Kokoro synthesise() logs warning when zero audio chunks returned with preview
- Kokoro synthesise() catches and logs pipeline-internal errors with preview
- Frontend: console.warn now includes char count + 80-char preview on failure and retry
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
synthesiseSpeech() called without explicit params now omits voice/speed/
blend from the request body. The backend detects this and auto-loads all
three from the user's saved settings (voice_tts_voice, voice_tts_speed,
voice_tts_blend), so briefing listen mode respects the voice the user
configured in Settings.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Add voice blend support to TTS pipeline and settings UI. Users can mix
2–5 Kokoro voices with per-voice weight sliders; the blended style tensor
replaces the single voice when enabled. Settings persist as JSON and auto-
load on synthesis when no explicit voice is supplied in the request.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Replace VOICE_ENABLED env var gate with DB-backed admin setting.
- services/voice_config.py: reads voice_enabled + voice_stt_model from
admin user's settings row (falls back to env var defaults)
- routes/admin.py: GET/PUT /api/admin/voice for admin configuration
- routes/voice.py, services/stt.py, services/tts.py: read enabled/model
from DB via voice_config instead of Config directly
- app.py: always schedule model loaders at startup; they self-gate on
the DB setting so no conditional needed at the call site
- SettingsView.vue: Voice section in Admin → Config tab (enable toggle +
STT model dropdown); user Voice tab now points to admin panel when disabled
No env var required to test — enable via Settings → Admin → Config → Voice.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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