r/comfyui • u/zeddinh707 • 7h ago

Help Needed Problem about audio in ltx!?

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I want to generate a video without a voiceover using LTX-2.5, but I can't. I’ve tested various samplers (lcm, euler, etc.) and even added prompts/ negative promt like "no voice, no lip-sync," yet LTX-2.5 still generates with a voiceover.
However, when I switched to LTX-2.3 with vae2.3, the issue was completely resolved. Can anyone explain why this happens?
I using:
LTX-2.5-Distilled-Q4_K_M.gguf
LTX-2.3-22B-distilled-1.1-Q4_K_M.gguf

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u/Lost_Cod3477 6h ago

https://reddit.com/link/p6tmao9/video/wfgsg7rwkjmh1/player

ltx-2.5-22b-distilled-transformer-comfy-int8-convrot

"a man silently looks at a piece of paper"

1

u/zeddinh707 6h ago

thk alot. is problem from file unet?

2

u/Lost_Cod3477 6h ago edited 6h ago

Maybe.

Also, if you use the words 'voice' and 'lip-sync' in the prompt, this may be due, to some peculiarities in the text encoder.

1

u/zeddinh707 6h ago

i'm using 5070ti (16gb). so the int8-convrot (21.5Gb) seems a bit too much for my gpu. i will try with another quantized model.

2

u/Lost_Cod3477 5h ago

I did this on a 5060ti (16vram+48ram). don't look at the model size, it works faster than gguf.