Echo is work based on LTX 2.3
A bug confirmed in ComfyUI: ever since LTX 2.3 release when guides’ strengths is set to any value other than 1 VRAM usage grows.
Bug fixed including improvements to how Sageattention is used - bringing results closer to what happens with default SPDA.
Guide strength can now be set above 1: “it’s not exactly linear, so 2.0 isn’t twice as strong, but it definitely has an affect.. could be useful for first to last frame etc.”
The decoder working without tiled efficiently is mostly a consequence of rattus’ dynamic VRAM implementation … It is amazing, it started off shaky, and I kept going back to regular offloading. but it kept getting better and now it’s hard to imagine going back
LTX 2.3 Inference code fix coming: PR#14097/issuecomment-4552771980 Drozbay: “that only really matters when using a reference audio tokens like for ID-Lora or lipdub, and even there the effect isn’t gigantic”
Native VAELoader can now load LTX 2.3 audio VAE
Hint: bf16 can be a good format for VAE-s
VRAM usage decreased many times for Tiny VAE, yes LTX 2.3 has a functional tiny VAE: PR #13617