* fix(audio): open 3-8ch HDA mics at native layout (#813)
HDA analog capture often reports 4 channels. Opening below that native
count can abort PortAudio after read with free(): corrupted unsorted
chunks (same class of bug as #666/#673).
Try the reported channel count first when it is between 3 and 8, then
2ch and 1ch. Pulse devices that advertise 32/128 channels still open
stereo-first. Downmix N channels to mono so engines keep seeing 1ch.
Virtual-device filtering for pipewire/default (#629) is unchanged.
* fix(audio): downmix HDA capture from first channel pair
Averaging all N HDA channels halves speech when only the front pair is live.
Keep stereo mean-of-both, and for 3+ channels average channels 0 and 1.
* fix(audio): pick loudest channel for N-ch downmix
First-pair-only downmix silenced mics on ch2+. For 3+ channels, select
the loudest channel by per-buffer mean-square so speech stays at full
level whether it lands on the front or rear pair. Stereo still averages
both channels.
* fix(audio): sticky N-ch downmix channel for open stream
Pin the loudest-channel pick for the life of a capture stream so a
noise burst on another input cannot switch the mic mid-utterance.
* fix(audio): gate sticky downmix lock on speech energy
Don't pin the N-ch sticky channel from a silent/ambient first buffer;
only lock once the loudest channel clears a documented mean-square floor.
* style: isort sticky-lock import in device config tests
* feat(vad): replace amplitude-based VAD with Silero neural network
Replace the simple amplitude threshold VAD with Silero VAD, a lightweight
neural network model that classifies audio as speech/non-speech. This
addresses the root cause of #302 (silence not stopping recording) and
- Add silero_vad.py wrapper using ONNX Runtime with bundled Silero v5 model
- Accumulate 512-sample chunks with 64-sample context window per official API
- Map existing vad_sensitivity (1-5) to Silero thresholds (0.8-0.3)
- Use max() across sub-chunks to avoid missing speech onsets
- Fall back to amplitude VAD when onnxruntime is unavailable
- Add onnxruntime as optional dependency (pip install vocalinux[vad])
Closes#344
* address review: add tests, LICENSE, logging, validation fixes
- Add unit tests for SileroVAD (process, reset, fallback, sensitivity mapping)
- Add MIT LICENSE for bundled Silero VAD model in data/
- Log which VAD backend is active on init
- Validate chunk length in SileroVAD.process()
- Skip is_speech check until a full Silero chunk is processed
- Add thread safety note to SileroVAD docstring
- Document resampling rate effect on VAD resolution
- Comment explaining why load_silero_vad() catches broad Exception
* address review: bundle license, document [vad] extra, surface backend in UI
- Pack data/LICENSE into the wheel (pyproject package-data) so attribution
travels with the model
- README: short note on enabling neural VAD via vocalinux[vad]
- Settings: VAD Sensitivity row subtitle shows the active backend; if
onnxruntime is missing, an info-row beneath the group spells out the
install command and the restart requirement
- silero_vad.is_silero_available() probes onnxruntime + model presence
w/o instantiating an InferenceSession
- CI installs .[dev,vad] so Silero paths get exercised
- Integration test for _record_audio Silero branch (mocked pyaudio +
scripted SileroVAD), covering silence flush, speech reset, and
sensitivity threshold mapping at sens=1 vs sens=5
- Tests no longer skip when other modules globally mock numpy: pop the
top-level numpy ref so a fresh import gives the real package, and
swap sys.modules["numpy"] inside the _record_audio call so the lazy
import inside the function picks up real numpy too
* fix(vad): drop silence-only recording buffers
* test(vad): align stop buffer expectations
* test(vad): preserve real numpy module
* fix(install): install vad support opportunistically
* test(vad): cover recognition manager vad edges
---------
Co-authored-by: Sbenazar <127324689+Sbenazar@users.noreply.github.com>
