Add Chatterbox and Qwen3-ASR as a multilingual voice option - #31
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Breeze speaks English and Chinese, so voice control has no answer for a German or French session. audio.cpp serves Chatterbox Multilingual and Qwen3-ASR from one process, on one GPU, both under permissive licenses. This is an addition, not a replacement: Breeze, the managed installer and the Whisper contract are untouched, and an empty recognition model keeps the existing multipart request byte for byte. - speech runtime "chatterbox": one WAV per phrase, since audio.cpp has no streaming mode for it. Playback is unchanged because the browser buffers each phrase anyway; only the first sentence waits longer. - recognition sends the OpenAI "model" field when configured, which audio.cpp requires to name its loaded model. - numbers are written out before synthesis: Chatterbox read "4070" as "70". One pack per language (German, English); a language without a pack keeps its digits, and the transcript always does. - Chatterbox clones a reference speaker and has no designed voice, so a designed voice is refused rather than silently swapped. - deploy/voice-multilingual holds the audio.cpp config, a systemd unit and a Compose service on the published CUDA image, with the GPU selectable. Measured on an RTX 3060: German speech at about 0.4x real time, German recognition at 2.5% word error over eight reference clips. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Included review availability: Your plan provides up to 2 included reviews per hour; 0 remain after this review. 📝 WalkthroughWalkthroughThis change adds a multilingual audio.cpp deployment with Chatterbox synthesis and Qwen3-ASR recognition. It updates voice validation, language handling, number pronunciation, API audio conversion, portal settings, documentation, and tests. ChangesMultilingual voice support
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~45 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant VoiceAddon
participant voiceRouter
participant Qwen3ASR
participant Chatterbox
VoiceAddon->>voiceRouter: Submit voice configuration and audio request
voiceRouter->>Qwen3ASR: Send audio with sttModel
Qwen3ASR-->>voiceRouter: Return transcription
voiceRouter->>Chatterbox: Send language, reference audio, and synthesis text
Chatterbox-->>voiceRouter: Return complete WAV audio
voiceRouter->>VoiceAddon: Return PCM audio response
Suggested reviewers: Merge Risk: ⚪ Minimal · up to The multilingual voice changes are ready to merge; expired lazy voice services continue to be cleaned up as intended. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 45.45% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 11 functions across 8 files. (2 skipped: 2 unsupported.)
✨ Finishing Touches🧪 Generate unit tests (beta)
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Numbers: each pack now knows how its own language groups thousands, so German "100.000" is one number rather than "einhundert Komma null null null". Dates, clock times, version strings, ranges and leading zeros keep their digits instead of being read as quantities. Languages: one list in voice-languages.ts backs both the API's allowlist and the add-on's dropdown, so the ten Chatterbox-only languages are reachable and nothing is offered that save would refuse. Chatterbox has no detection mode, so "auto" is refused for it rather than silently meaning English, and a designed voice is refused on save instead of on every phrase. Deployment: server.json binds loopback like the Breeze unit, with the container's bind address set on the Compose command line, where the published port is what limits reach. The unit runs the binary that audio.cpp's own build script writes. Also: keep a WAV whose data chunk carries a placeholder size, bound the fmt chunk read, drop a foreign recognition model when connecting the managed voice, build only the payload the active runtime sends, and read the settings once per request. "task": "clon" is audio.cpp's own name for voice cloning and is left as it is, now noted in the guide. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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In `@deploy/voice-multilingual/pithagoras-audio-cpp-multilingual.service`:
- Line 10: Make the systemd unit’s CUDA device selection configurable by
replacing the hardcoded CUDA_VISIBLE_DEVICES value in the service configuration
with the installed service’s GPU setting, such as VOICE_GPU. Update the adjacent
comment to remove the assumption that a second GPU exists while preserving the
native deployment’s existing startup behavior.
In `@server/src/api/voice.ts`:
- Around line 278-279: Update the Chatterbox response flow to call wavPcm(wav)
before either Content-Type branch, reusing the validated conversion result for
audio/pcm responses. In wavPcm, require a valid preceding PCM fmt chunk before
accepting a data chunk, and reject malformed or non-PCM WAV input instead of
returning it as audio/wav.
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deploy/voice-multilingual/pithagoras-audio-cpp-multilingual.servicedeploy/voice-multilingual/server.jsondocker-compose.voice.ymldocs/guide/voice.mdserver/src/api/voice.tsserver/src/voice-languages.tsserver/src/voice-numbers.tstests/browser/voice-addon.spec.mtstests/voice-numbers.test.mtstests/voice.test.mtsweb/src/api.tsweb/src/components/VoiceAddon.tsx
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…tterbox-qwen3-asr # Conflicts: # server/src/api/voice.ts
wavPcm now requires a PCM fmt chunk ahead of the data chunk, and the speech route runs it before either response branch, so a malformed WAV is never passed on as audio/wav. The systemd unit reads VOICE_GPU like the Compose service, defaulting to GPU 0. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Voice currently pairs Breeze with Whisper. Breeze speaks English and Chinese, so a German or French session has no voice to answer in. This adds audio.cpp serving Chatterbox Multilingual for speech and Qwen3-ASR for recognition, from one process on one GPU. Both are MIT/Apache-2.0, unlike Breeze's research-only weights.
It is an addition, not a replacement. Breeze, the managed installer and the Whisper request are untouched: with the new recognition-model field empty, the multipart request is byte for byte what it was.
What is in it
chatterbox: audio.cpp has no streaming mode for it, so each phrase arrives as one complete WAV instead of a PCM stream. Playback is unchanged, because the browser already buffers each phrase before playing it; only the first sentence of a reply waits longer.server.jsongives it. Whisper.cpp has one model and ignores the field.server/src/voice-numbers.ts); a language without a pack keeps its digits, and the transcript always keeps them.deploy/voice-multilingual/has the audio.cpp config and a systemd unit, plus a Compose service on the published CUDA image with the GPU selectable throughVOICE_GPU.Measured
On an RTX 3060, both models loaded, 5.6 GB of GPU memory:
Sample measurements on one machine, not guarantees.
Checks
npm run build, plusnode --import tsx --testover the voice suites (47 tests, including a new Chatterbox test and the number packs). Also run end to end against a live audio.cpp server: the portal synthesised German speech and Qwen3-ASR read back "RTX 4070", "12 Gigabyte" and "3,5 Prozent" correctly — the cases that were mangled before the number packs.Not covered: the Playwright browser tests, and no CI runs these suites today.
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Summary by CodeRabbit
New Features
Documentation
Tests