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feat(audio): replace RNNoise with DeepFilter pipeline #9

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yuris merged 1 commit from feat/mic-audio-deepfilter into main 2026-07-18 13:29:15 +00:00
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yuris commented 2026-07-18 13:28:02 +00:00
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- Swap RNNoise LADSPA plugin for DeepFilter (deepfilternet) for
  studio-grade, gate-free noise suppression.
- Add hardware capture gain service (Noir Voix Mic Capture Volume → max)
  so software gain is minimal, reducing amplified static.
- Activate compressor (peak −12 dB) to level close-mic peaks before
  the limiter; add noise gate (thr −40, duck −24 dB) for quiet pauses.
- Tune EPP to balance_performance (post-resume too) so the realtime DSP
  thread ramps to base clock and avoids underruns.
- Add docs/mic-audio-session.md with chain diagram and tuning reference.

Chain: mic (+18 dB HW) → DeepFilter(75) → +2 dB → gate(thr −40, duck
−24) → comp(−12) → limiter(−3)
yuris merged commit ff6f32c98a into main 2026-07-18 13:29:15 +00:00
yuris deleted branch feat/mic-audio-deepfilter 2026-07-18 13:29:15 +00:00
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