Signal Filter Designer
Design a digital Butterworth filter. Choose frequencies to keep or reduce, preview its response and download the filter settings.
What is a Butterworth filter?
A Butterworth filter keeps a chosen range of frequencies with a smooth, flat response. Enter a sample rate, cutoff, filter type and order. Check the response chart and download the settings. The tool designs a filter; it does not edit an audio file.
Your result
A little clarity, right here.
Start with your own content or load the example. Your result will appear here.
Three simple steps
How to use Signal Filter Designer
Choose your input and review the processing notice.
Send the job to the isolated processing service.
Review the result and download your export.
Common questions
Good to know
Understand the result.
Keep the original.
Is this tool free, and are my files uploaded?
This tool is free with no account required. When you run the tool, your input goes to a separate processing service. Temporary files are deleted when the job ends. You can download the result to your device.
What are the limits and details?
This designs coefficients without filtering an uploaded signal. Cutoffs must be below the Nyquist frequency. Verify numerical behavior and phase effects in the target system.
Limits: one file up to 8 MB; 500,000 characters per text field. One job runs at a time on the worker, with a two-minute limit.