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CalamitousFelicitousness
41ffa78438
drop the project-specific stage 1 direct audio decode (a6870f7d2). smoke
testing showed broadband tinniness on distilled is BWE-bound, not stage 2
corruption, so the deviation didn't fix the underlying issue.
revert to canonical:
- _latent_pass returns video latents only; result.audio is unused.
- stage 2 receives audio_latents=None (default), prepare_audio_latents
generates fresh gaussian noise, audio scheduler runs the 3 stage-2
sigmas under identity guidance, video<->audio cross-attention
conditions the audio branch.
- capture stage 2 result.audio[0].float().cpu() for save.
upstream evidence: pipeline_ltx2.py:937-940 documents audio_latents as
pre-generated noisy latents (initial gaussian, not stage 1 output); no
caller in diffusers threads stage outputs into the kwarg.
non-latent path is unchanged and continues to work via p.audio_capture.