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Audio Band-Reject Filter

Remove a specific band of frequencies

Cuts a narrow band around a center frequency (notch) to tame resonances, hum, or harshness.

Click to upload file or drag and drop file here

Maximum file size: 200MB Supported formats: audio/*

Key Facts

Category
Media
Input Types
file, number, select
Output Type
file
Sample Coverage
4
API Ready
Yes

Overview

The Audio Band-Reject Filter removes a specific band of frequencies from audio files. It targets a narrow range around a center frequency to reduce unwanted sounds like hum, resonance, or harshness, enhancing audio clarity.

When to Use

  • •When eliminating electrical hum or buzz from audio recordings.
  • •To remove resonant frequencies that cause feedback in live sound setups.
  • •When editing audio to cut out harsh or piercing tones without affecting the overall sound.

How It Works

  • •Upload your audio file in a supported format such as MP3 or WAV.
  • •Set the center frequency in Hz to target the specific band you want to remove.
  • •Adjust the bandwidth in Hz to define the width of the frequency cut.
  • •Choose an output format and download the processed audio file.

Use Cases

Removing 60 Hz hum from home studio recordings.
Eliminating feedback frequencies during podcast editing.
Cleaning up audio tracks by cutting specific resonant tones in music production.

Examples

1. Removing Electrical Hum from a Podcast

Podcast Producer
Background
A podcast episode has a persistent 60 Hz hum from electrical interference in the recording environment.
Problem
The hum reduces audio quality and makes the content sound unprofessional.
How to Use
Upload the audio file, set center frequency to 60 Hz, bandwidth to 50 Hz, and output format to MP3.
Outcome
The hum is significantly reduced, resulting in cleaner and more professional audio.

2. Taming Resonant Feedback in Live Audio

Background
During a live concert recording, a feedback tone at 2 kHz disrupts the audio feed.
Problem
Feedback causes distortion and needs to be removed without affecting other frequencies.
How to Use
Process the audio by setting center frequency to 2000 Hz and bandwidth to 100 Hz to narrowly target the feedback.
Outcome
The feedback is eliminated, preserving the clarity and quality of the live performance.

Try with Samples

audio, video, file
Copyright-Free AAC Audio Samples
High-quality AAC encoded audio samples for testing and development, featuring nature sounds and meditation music with excellent compression
title token audio
audio
Copyright-Free MP3 Audio Samples
Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio
title token audio
audio
Copyright-Free WAV Audio Samples
Uncompressed PCM WAV audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
title token audio
audio
Copyright-Free OGG Vorbis Audio Samples
Open-source OGG Vorbis audio samples for testing and development, featuring excellent compression with nature sounds and meditation music
title token audio
audio

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FAQ

What audio formats are supported for upload?

The tool accepts common audio formats like MP3, WAV, AAC, and others listed in the output options.

How do I choose the correct center frequency?

Identify the problematic frequency using audio analysis tools or by ear, then input it as the center frequency.

Can I process multiple audio files at once?

No, this tool processes one audio file at a time for precise control over the filtering.

What does the bandwidth setting control?

The bandwidth determines the width of the frequency band that is attenuated around the center frequency.

Is there a limit on the audio file size?

Yes, the audio file must be under 200 MB to be processed by the tool.

API Documentation

Request Endpoint

POST /en/api/tools/audio-band-reject-filter

Request Parameters

Parameter Name Type Required Description
audioFile file (Upload required) Yes -
centerHz number No -
widthHz number No -
outputFormat select No -

File type parameters need to be uploaded first via POST /upload/audio-band-reject-filter to get filePath, then pass filePath to the corresponding file field.

Response Format

{
  "filePath": "/public/processing/randomid.ext",
  "fileName": "output.ext",
  "contentType": "application/octet-stream",
  "size": 1024,
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}
File: File

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-audio-band-reject-filter": {
      "name": "audio-band-reject-filter",
      "description": "Remove a specific band of frequencies",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=audio-band-reject-filter",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

Supports URL file links or Base64 encoding for file parameters.

If you encounter any issues, please contact us at [email protected]