ComfyUI-NKD-Sigmas-Curve

NKDH3AudioShiftCurve

MiniMax H3 only. The stock MiniMaxH3SigmaShift node sets shiftaudio once and it stays there for the whole run. This one lets you draw how it moves instead: X is the sampling progress, Y is a multiplier on whatever level that node set. Low shift makes the audio resolve early and the video lock onto it. High shift keeps both streams moving together. Being able to change that across the run means you can have one at the start and the other by the end. mermaid flowchart LR M(["Model"]):::input --> SS(["MiniMaxH3SigmaShift"]):::external SS --> CURVE["NKD H3 Audio Shift Curve"]:::nkd CURVE -- model --> SAMP(["your sampler"]):::external classDef nkd fill:#3b3b6b,stroke:#8ab4ff,stroke-width:2px,color:#fff classDef input fill:#2d2d2d,stroke:#888,color:#eee classDef external fill:#2d2d2d,stroke:#888,color:#eee - multmin (default 0.5) is what the bottom of the curve multiplies the incoming shiftaudio by, and multmax (default 2.0) is what the top multiplies it by. - debug logs the shift applied at each step to the console. - The curve is the same editor as the sigma node: click to add a point, drag to move, Shift+click to remove. It multiplies rather than replaces, so it works with MiniMaxH3SigmaShift instead of fighting it: that node still owns the level, this one only shapes it over time. The default curve is flat at 1.0x and does nothing at all, so dropping it into a graph changes no output until you actually move a point. Whatever the multiplier lands on, the value handed to the model is kept inside a safe range. Keep the range modest. The far ends of the dial trade coherence for…

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NKDSigmasCurve

Draw the noise schedule itself and feed it to any sampler. It’s all about control. Standard schedulers (Karras, exponential, etc.) give you a fixed curve shape (nothing wrong with that) but once you unlock the power of custom sigmas, you can decide exactly how you want to denoise the image. That gives you fine-grained control over composition, details, and a bunch of nerdy stuff. https://github.com/user-attachments/assets/281fa043-0900-4e7b-883d-1018953b01e0 This is all with a fixed seed. As you can see, specially in the las 2 generations. Tuning the sigma curve lets you nail the shapes and details at just the right moment during generation. For instance, I use it to swap out a bare chest for a T-shirt on the fly. With the latest version you can also use it to study standar schedulers or start from them https://github.com/user-attachments/assets/41f8b72d-c270-4aa5-ab08-32de1e82d3bb - I strongly, highly, super recommend using it alongside the RES4LYF node pack (and joining the bongmath cult), but technically you could plug it into any sigmas input, like in a CustomSampler. - The node overrides the scheduler and steps, so set the Ksampler to 1.0 denoise and control these from the Sigmas Curves node instead. - If you know nothing about sigmas, treat the maxsigma value as your new "denoise" setting (kind of). - The curve is your new "scheduler" (you're basically drawing it yourself instead of picking one from a dropdown). - You can choose between linear curve or b-spline type. Up to you. - Interactive canvas widget embedded directly in the ComfyUI node, no external tools neede…