Squashed branch: voice/dave-recv → master. Closes Pas 12 (DAVE E2E) and lands
voice-mode UX polish + verbal voice control on top of the Pas 1-10 scaffolding
already on master.
## DAVE E2E receive-side decrypt (e4f3177)
Vendored fork: discord-ext-voice-recv 0.5.3a+echo.dave1. Patches the receive
pipeline to handle Discord's mandatory DAVE encryption on voice gateway v=8.
- `_maybe_dave_decrypt`: uses davey.can_passthrough(user_id) as primary gate,
falls through to dave.decrypt for DAVE-epoch peers, drops on decrypt failure
without killing the reader thread.
- VAD fix: silero-vad v5+ requires exactly 512 samples; our 100ms window
(1600 samples) was silently raising ValueError → STT never fired. Now slice
into 512-sample chunks.
- Whisper: bumped beam_size 1→5 and added RO initial_prompt.
- Tests: 11 DAVE unit tests + 2 callback integration tests + contract test
with fork-version guard.
## Voice UX polish (d1bc77e)
- Killed the 3s "mă gândesc" filler (always collided with Claude p50 4-7s).
- Barge-in via `ttsq.clear()` at top of `on_segment_done`.
- DTX silence-flush poller (200ms tick) — Discord stops sending RTP packets
when silent, so the inline silence-check in sink.write() never fired for
trailing audio; background thread handles it.
- `EchoStreamingAudioSource.read()` non-blocking — old `get_frame(timeout=0.1)`
wrecked Discord's 20ms cadence and the client interpreted bursts as
stuttering (Marius heard "4 de minute" instead of full sentence).
- RO time expansion: 23:09 → "douăzeci și trei și nouă minute".
- Supertonic Unicode sanitize centralized in tools/tts.py.
- Whisper local_files_only=True — no HF metadata GET on each startup.
- Diagnostic logging through sink → VAD → Claude stream → TTS chain.
## Voice mode iteration (e589e48)
- `personality/VOICE_MODE.md` — voice-tailored system prompt (short, no
markdown, no abbreviations, time without seconds, distances in
"mii"/"milioane"); plumbed via build_system_prompt(voice_mode=True).
- Isolated voice session key `voice:<channel_id>` — voice doesn't share
context with text adapter on the same channel; auto-applied without
/clear ceremony. /clear drops both keys.
- Metric units + Romanian thousands (normalize.py): "384.000 km" →
"trei sute optzeci și patru de mii de kilometri" with feminine-correct
pluralization and "de" particle for ≥20.
- `/voice setvoice <M1-F5>` slash command with native autocomplete; swaps
live + persists voice.default_voice to config.json.
- Verbal voice change (src/voice/voice_commands.py + 29 tests) — "schimbă
vocea pe M5", "voce em cinci", with permissive substring fallback for
Whisper-mangled forms like "Mâcinci"=M5 and "unul cinci"=M5. Whisper
initial_prompt now lists voice vocabulary to bias STT toward clean
outputs.
- Fast barge-in: VAD ≥2 consecutive windows (~200ms) on Marius's user
while Echo has pending TTS frames → cut him off mid-sentence so user
doesn't wait the full silence + STT cycle. Acoustic echo bleed-through
still requires headphones (no AEC).
## Test suite
130 voice + router tests pass (test_voice_recv_dave, test_voice_session_cleanup,
test_voice_adapter_contract, test_voice_normalize, test_voice_commands,
test_router).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
src/voice/tts_stream.py (~280 lines):
- clause_segments(text, min_words=8): yield Romanian-aware clause chunks.
Split la punct (./!/?;:,) cu accumulation până min_words satisfied;
edge case text < min_words → single chunk. NU split mid-word/number/
currency. Romanian intonație de frază se rupe la sentence break — 8+
words minimizează seams.
- TTSQueue worker thread: text queue in → PCM frames out. Methods:
start/stop/push_text/push_filler/clear/is_empty. normalize_for_tts()
apply first, then clause_segments(), then Supertonic synth per chunk.
- EchoStreamingAudioSource(discord.AudioSource): read() pull from PCM
queue, 20ms frames (3840 bytes 48kHz s16le stereo). Eliminates RTP
gap between play() calls — single play() per session, source pulls.
- load_thinking_wav(): one-shot cache → 140 × 20ms frames (~2.8s)
pentru filler "Stai puțin să-mi adun gândurile".
- wav_to_pcm_20ms_frames(): WAV parser + ffmpeg subprocess resample
la 48kHz s16le stereo dacă nevoie.
Smoke test (în session): clause_segments behaviour OK, thinking.wav
loads, TTSQueue + EchoStreamingAudioSource construct clean. Integration
testing deferred la convergență (Pas 7 + Pas 11).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Pure functions pentru TTS text normalization (RO):
- strip_markdown: regex bold/italic/code/link/heading/list
- expand_numbers_ro: num2words pentru cardinals + decimal handling
("3.14" → "trei virgulă paisprezece", "3.05" → "trei virgulă zero
cinci" digit-by-digit la leading zero)
- expand_currency: formă naturală RO ("12.50 RON" → "doisprezece lei
și cincizeci de bani", "$25.99" → "douăzeci și cinci de dolari și
nouăzeci și nouă de cenți")
- expand_symbols: %/&/@/° + whitespace collapse
- expand_abbreviations: etc./dl./dna./nr./ş.a./ş.a.m.d.
- normalize_for_tts: full pipeline + hard truncate 200 cuvinte cu
"Restul l-am scris în chat."
Pipeline order: markdown → abbreviations → currency → numbers →
symbols → truncate. Currency BEFORE numbers — altfel "12.50 RON" se
degradează la "doisprezece virgulă cincizeci RON". Romanian "de"
particle rule: n>=20 AND (n%100 not in 1..19) → "o sută de lei",
"o sută cinci lei" (no "de"). n=1 with currency → "un dolar" /
"un leu" (article, nu cardinal).
35/35 tests pass: markdown(5), cardinals(6), decimals(4), currency
RON/USD/EUR/GBP mix(8), symbols(4), abbreviations(4), truncation(2),
edge cases empty/whitespace(2).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
