ComfyUI  >  Nodes  >  ComfyUI-AudioScheduler

ComfyUI Extension: ComfyUI-AudioScheduler

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a1lazydog (Account age: 4811 days)
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How to Install ComfyUI-AudioScheduler

Install this extension via the ComfyUI Manager by searching for  ComfyUI-AudioScheduler
  • 1. Click the Manager button in the main menu
  • 2. Select Custom Nodes Manager button
  • 3. Enter ComfyUI-AudioScheduler in the search bar
After installation, click the  Restart button to restart ComfyUI. Then, manually refresh your browser to clear the cache and access the updated list of nodes.

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ComfyUI-AudioScheduler Description

ComfyUI-AudioScheduler enables loading mp3 files to drive animations and prompt scheduling using audio nodes, designed for integration with FizzNodes.

ComfyUI-AudioScheduler Introduction

ComfyUI-AudioScheduler is an extension designed to help AI artists integrate audio data into their creative projects. This extension provides a set of tools (nodes) that allow you to load audio files, analyze their properties, and use this information to control various aspects of your AI-generated animations or visualizations. By leveraging audio data, you can create more dynamic and synchronized multimedia experiences.

Key Features:

  • Loading Audio Files: Supports MP3 and WAV formats.
  • Amplitude Analysis: Reads and visualizes the amplitude of audio over time.
  • Frequency Analysis: Performs Fast Fourier Transforms (FFTs) to analyze frequency components.
  • Graphical Visualization: Generates graphs to preview amplitude and frequency data.
  • Dynamic Text Prompts: Creates text prompts driven by audio amplitude changes.

How ComfyUI-AudioScheduler Works

ComfyUI-AudioScheduler works by breaking down audio files into their fundamental components and using this data to influence other media elements. Here’s a simplified explanation:

  1. Loading Audio: The extension can load audio files in MP3 or WAV formats.
  2. Analyzing Audio: It reads the amplitude (volume) and frequency (pitch) information from the audio.
  3. Visualizing Data: The extension can create visual graphs of the amplitude and frequency data.
  4. Controlling Media: This data can then be used to control animations, generate text prompts, or influence other visual elements in your project. Imagine you have a piece of music and you want certain visual effects to sync with the beats or melody. ComfyUI-AudioScheduler can analyze the music and provide the necessary data to make this synchronization possible.

ComfyUI-AudioScheduler Features


  • Input: List of audio file names (MP3, WAV).
  • Output: Loaded audio data.
  • Description: Loads audio files from a specified directory and prepares them for further analysis.


  • Input: Loaded audio data, audio channel, frames per second.
  • Output: FFT data, total number of frames.
  • Description: Performs FFT on the audio data to extract frequency information. Useful for analyzing the pitch and tone of the audio.


  • Input: Loaded audio data, audio channel, lower and upper band range.
  • Output: Graph image of amplitude.
  • Description: Creates a visual graph of the amplitude within a specified frequency range. Helps in visualizing how the volume changes over time.


  • Input: FFT data, operation (avg, max, sum), lower and upper band range.
  • Output: Amplitude data.
  • Description: Calculates amplitude values from FFT data based on specified operations and frequency ranges. Useful for aggregating amplitude data.


  • Input: Amplitude data, max and optional min amplitude.
  • Output: Clipped amplitude data.
  • Description: Clips amplitude values to a specified range. Ensures that the amplitude stays within desired limits.


  • Input: Amplitude data, frames for attack, hold, and release.
  • Output: Adjusted amplitude data.
  • Description: Adjusts amplitude data with transient characteristics. Controls the attack, hold, and release behavior of the amplitude.


  • Input: Amplitude data.
  • Output: Normalized amplitude data.
  • Description: Normalizes amplitude data, optionally inverting the values.


  • Input: Normalized amplitude data, gating threshold.
  • Output: Gated normalized amplitude data.
  • Description: Gates normalized amplitude data based on a specified threshold.


  • Input: List of text prompts, normalized amplitude data, triggering threshold, loop, shuffle.
  • Output: Dynamic text string.
  • Description: Generates text prompts based on changes in normalized amplitude. Can loop or shuffle prompts.


  • Input: Normalized amplitude data.
  • Output: Float and integer values of normalized amplitude.
  • Description: Converts normalized amplitude data to numerical values.


  • Input: Normalized amplitude data.
  • Output: Graph image of normalized amplitude.
  • Description: Generates a graph to visualize normalized amplitude data.


  • Input: Amplitude data.
  • Output: Float and integer values of amplitude.
  • Description: Converts amplitude data to numerical values.


  • Input: Amplitude data.
  • Output: Graph image of amplitude.
  • Description: Generates a graph to visualize amplitude data.

Troubleshooting ComfyUI-AudioScheduler

Common Issues and Solutions

  1. Audio File Not Loading:
  • Solution: Ensure the audio file is in MP3 or WAV format and located in the specified directory.
  1. No Output from FFT Node:
  • Solution: Check that the audio data is correctly loaded and the channel and frames per second are properly set.
  1. Graph Not Displaying:
  • Solution: Verify that the input data is correct and within the specified frequency range.

Frequently Asked Questions

  • Q: Can I use other audio formats?
  • A: Currently, only MP3 and WAV formats are supported.
  • Q: How do I adjust the frequency range for analysis?
  • A: Use the lower_band_range and upper_band_range parameters in the relevant nodes.
  • Q: What does normalizing amplitude do?
  • A: Normalizing scales the amplitude data to a standard range, making it easier to compare and use in visualizations.

Learn More about ComfyUI-AudioScheduler

For more detailed tutorials, documentation, and community support, you can explore the following resources:

  • ComfyUI Community Forums (
  • These resources will help you get the most out of ComfyUI-AudioScheduler and connect with other AI artists who are using the extension in their projects.

ComfyUI-AudioScheduler Related Nodes


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