The previous -40 dBFS static threshold sat right on top of typical
phone mic ambient, so silence detection rarely fired and the user
always had to tap stop manually.
Silence threshold is now dynamic: track the session peak dBFS and
treat "silent" as 15 dB below peak. Auto-calibrates per mic and
environment rather than assuming a fixed ambient level.
- Grace period (1500 ms) at start so the user has time to begin
speaking before checks arm.
- Static -35 dB fallback until the peak clears -20 dB so a dead-
silent session doesn't spin forever.
- Silence duration bumped 1500 → 2000 ms for breathing room.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
VoiceState now carries a normalized mic amplitude (0..1) updated
from the existing onAmplitudeChanged subscription, with a 0.02
change threshold so we don't spam rebuilds.
VoiceMicButton swaps the constant-rate AnimationController for an
AnimatedScale + animated glow driven by the live amplitude. 0.1
floor keeps the button breathing on silence; 120ms ease-out smooths
between 200ms samples.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Voice: recreate AudioRecorder each session to avoid stale native
state, improve permission handling (re-check after settings), show
feedback after 3 consecutive empty transcripts, allow STT-only mode
when TTS is unavailable.
Knowledge: hydrate IDs immediately after loading more pages so
scroll-based pagination doesn't stall at the bottom.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Three bugs causing silent STT failure on Android:
1. AudioEncoder.opus produces an OGG container on Android but the file
was named .webm — faster-whisper rejected it due to format mismatch.
Changed to AudioEncoder.aacLc + .m4a (reliable on all Android versions).
Updated voice_api.dart to send audio/mp4 MIME type accordingly.
2. onError callback was never stored, so errors in _startListening() and
_handleSilence() were silently swallowed. Now stored as _onError and
called before exitVoiceMode() on any failure.
3. Amplitude stream can emit NaN or ±Infinity on some Android devices
during recorder initialisation. NaN < -40.0 is false, so silence was
never detected. Now treated explicitly as silence.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
bvandeusen