j.foucher
c2142f3e6b
- Remove silence padding accumulation bug: QueueAudio'd silence was accumulating in USoundWaveProcedural's internal buffer during TTS gaps, delaying real audio by ~800ms. USoundWaveProcedural with INDEFINITELY_LOOPING_DURATION generates silence internally instead. - Fix pre-buffer bypass: guard OnProceduralUnderflow with bPreBuffering check — the audio component never stops (INDEFINITELY_LOOPING_DURATION) so it was draining AudioQueue during pre-buffering, defeating it entirely. - Audio pre-buffer default 2000ms (max 4000ms) to absorb ElevenLabs server-side TTS inter-chunk gaps (~2s between chunks confirmed). - Add diagnostic timestamps [T+Xs] in HandleAudioReceived and AudioQueue DRY/recovered logs for debugging audio pipeline timing. - Fix lip sync not returning to neutral: add snap-to-zero (< 0.01) in blendshape smoothing pass and clean up PreviousBlendshapes to prevent asymptotic Lerp residuals keeping mouth slightly open. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>