Makes LTX-2.3 a first-class, faithful card (was wrongly merged into the single-stage base):
- LTX23DenoiseLoop (loop.py): single-pass joint A/V denoise — one DiT forward per step cross-attends
video<->audio via the adapter's (v_vel,a_vel) return; full-res video latent + a [8,T,16] audio latent;
distilled few-step schedule (BASE_SIGMAS). Video-only when no audio requested.
- build_ltx2_3_card (model_id 'ltx2.3-distilled' — the name now correctly names the REAL 2.3): 5
components incl. audio_vae (AudioDecoder) + vocoder (required_for t2vs, optional_for t2v); caps
T2V + T2VS. build_ltx2_3_program: dual-connector text-encode -> joint denoise -> video + audio decode.
- registry.py routes FastVideo/LTX-2.3-Distilled-Diffusers -> this card (split from the base entry).
- Toy support: ToyTextEncoder.encode_av (separate video/audio text), ToyDiT joint A/V (audio now a
keyword-only arg so positional callers like the talker are unaffected), channel-agnostic
ToyAudioVAE (np.resize identity for the existing 2-stage T2VS).
- CPU-verified: toy T2VS -> video+audio (8 steps), T2V -> video-only; CPU suite green (202+2).
GPU audio-VAE/vocoder loaders + the real-T2VS GPU verify are the next step.
SolitaryThinker
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