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fix(call): keep browser AGC on with ML noise suppression (DeepFilterNet "makes people quiet") #480

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jared merged 1 commits from fix/denoise-keep-agc into lotus 2026-10-29 21:44:23 -04:00
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Lotus CIandClaude Opus 5.5 58f7b18746 fix(call): keep browser AGC on with ML noise suppression
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Choosing an ML model (RNNoise / Speex / DTLN / DeepFilterNet) turned the
browser's auto gain control off along with its noise suppressor, so the
call carried the mic's raw level: voices came out 10-20 dB quieter than
in the browser tier and DeepFilterNet "made people quiet". Measured with
speech through each model exactly as the call runs it, the models keep
the voice within ~1.5 dB (DTLN -0.1, DFN3 -1.7, RNNoise -1.3, Speex -1.5)
while cutting background noise 6-29 dB, so the loss was AGC, not the
models. Keep AGC on in every tier.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017PCb59uY3UKqDqt7B6hzd5
 2026-10-29 21:25:34 -04:00