LTXVScheduler - ComfyUI Built-in Node Documentation

The LTXVScheduler node generates sigma values for a custom sampling process.

The LTXVScheduler node generates sigma values for a custom sampling process. It calculates the noise schedule from the number of tokens in the provided latent, or uses a default of 4096 tokens when no latent is connected, and can optionally stretch the sigma values so the final value matches the 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 used in the sigma calculation (default: 2.05)	FLOAT	Yes	0.0-100.0 (step: 0.01)
base_shift	Base shift value used in the sigma calculation (default: 0.95)	FLOAT	Yes	0.0-100.0 (step: 0.01)
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). Used only when stretch is enabled.	FLOAT	Yes	0.0-0.99 (step: 0.01)
latent	Optional latent input used to calculate the token count for sigma adjustment. When not provided, a default token count of 4096 is used.	LATENT	No	-

Note: When stretch is enabled, the non-zero sigma values are rescaled so that the last non-zero sigma equals the terminal value.

Outputs

Output Name	Description	Data Type
sigmas	Sigma values generated for the sampling process	SIGMAS

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