LTXVScheduler - ComfyUI Built-in Node Documentation - ComfyUI

The LTXVScheduler node generates sigma values for custom sampling processes. It calculates noise schedule parameters based on the number of tokens in the input latent and applies a sigmoid transformation to create the sampling schedule. The node can optionally stretch the resulting sigmas to match a specified terminal value.

Inputs

Parameter	Description	Data Type	Required	Range
`steps`	Number of sampling steps (default: 20)	INT	Yes	1-10000
`max_shift`	Maximum shift value for sigma calculation (default: 2.05)	FLOAT	Yes	0.0-100.0
`base_shift`	Base shift value for sigma calculation (default: 0.95)	FLOAT	Yes	0.0-100.0
`stretch`	Stretch the sigmas to be in the range [terminal, 1] (default: True)	BOOLEAN	Yes	True/False
`terminal`	The terminal value of the sigmas after stretching (default: 0.1)	FLOAT	Yes	0.0-0.99
`latent`	Optional latent input used to calculate token count for sigma adjustment	LATENT	No	-

Note: The latent parameter is optional. When not provided, the node uses a default token count of 4096 for calculations.

Outputs

Output Name	Description	Data Type
`sigmas`	Generated sigma values for the sampling process	SIGMAS

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