Sampler SPEED (Spectral Progressive Diffusion)

A ComfyUI node in sampling/custom_sampling/samplers with 10 inputs and 1 output.

By ruwwww·Created 3 months ago·Updated about a month ago· 63

◄base_samplereuler►

◄transformdct►

◄modedelta_optimal►

◄model_presetflux►

◄scales0.5,1.0►

◄delta0.010►

◄manual_sigmas0.85►

◄spectrum_A203.615►

◄spectrum_beta1.915►

◄seed0►

Categorysampling/custom_sampling/samplers

Inputs (10)

Name	Type	Default	Description
base_sampler	COMBO	euler	Underlying ODE solver. Any comfy k_diffusion sampler is supported. Multistep solvers restart at each SPEED transition because we segment the schedule.
transform	COMBO	dct	Spectral basis used at each transition. DCT (default) supports any scale ratio; DWT requires consecutive scales to differ by exactly 2x; FFT accepts any ratio.
mode	COMBO	delta_optimal	`delta_optimal` computes transitions from `scales`, `delta`, and the selected power-spectrum preset. `manual` uses user-specified sigma thresholds.
model_preset	COMBO	flux	Power-spectrum preset for delta-optimal mode. `flux` and `wan21` use measured (A, beta). `custom` uses the manual A / beta inputs below.
scales	STRING	0.5,1.0	Comma-separated resolution fractions ending at 1.0. Used in delta_optimal mode. Example: `0.5,1.0` or `0.25,0.5,1.0`.
delta	FLOAT	0.0100.0001–0.5	Noise-dominated tolerance. Smaller values transition later.
manual_sigmas	STRING	0.85	Comma-separated sigma thresholds, one per transition (length S-1 to match `scales`). Used in `manual` mode. Example for scales=`0.25,0.5,1.0`: `0.95,0.85`.
spectrum_A	FLOAT	203.6150–1000000	Power-spectrum amplitude A (used when model_preset=custom).
spectrum_beta	FLOAT	1.9150–10	Power-spectrum decay exponent beta (used when model_preset=custom).
seed	INT	00–2147483647	Seed for the spectral-noise padding at each transition.

Name	Type	Description
SAMPLER	SAMPLER	—