> ## Documentation Index
> Fetch the complete documentation index at: https://docs.comfy.org/llms.txt
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# BetaSamplingScheduler - ComfyUI Built-in Node Documentation

> Complete documentation for the BetaSamplingScheduler node in ComfyUI. Learn its inputs, outputs, parameters and usage.

> This documentation was AI-generated. If you find any errors or have suggestions for improvement, please feel free to contribute! [Edit on GitHub](https://github.com/Comfy-Org/embedded-docs/blob/main/comfyui_embedded_docs/docs/BetaSamplingScheduler/en.md)

The BetaSamplingScheduler node generates a sequence of noise levels (sigmas) for the sampling process using a beta scheduling algorithm. It takes a model and configuration parameters to create a customized noise schedule that controls the denoising process during image generation. This scheduler allows fine-tuning of the noise reduction trajectory through alpha and beta parameters.

## Inputs

| Parameter | Data Type | Required | Range       | Description                                                                             |
| --------- | --------- | -------- | ----------- | --------------------------------------------------------------------------------------- |
| `model`   | MODEL     | Yes      | -           | The model used for sampling, which provides the model sampling object                   |
| `steps`   | INT       | Yes      | 1 to 10000  | The number of sampling steps to generate sigmas for (default: 20)                       |
| `alpha`   | FLOAT     | Yes      | 0.0 to 50.0 | Alpha parameter for the beta scheduler, controlling the scheduling curve (default: 0.6) |
| `beta`    | FLOAT     | Yes      | 0.0 to 50.0 | Beta parameter for the beta scheduler, controlling the scheduling curve (default: 0.6)  |

## Outputs

| Output Name | Data Type | Description                                                       |
| ----------- | --------- | ----------------------------------------------------------------- |
| `SIGMAS`    | SIGMAS    | A sequence of noise levels (sigmas) used for the sampling process |

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