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Audio Notch Filter

Remove a very narrow frequency band (e.g., hum)

Uses a narrow bandreject (notch) to cut specific problematic frequencies like 50/60Hz hum or ringing.

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 Notch Filter is a utility tool designed to remove narrow frequency bands from audio files, such as 50/60Hz hum or resonant ringing. It uses a bandreject filter to precisely target and eliminate problematic frequencies, improving audio clarity with adjustable settings for center frequency, bandwidth, and depth.

When to Use

  • •To eliminate 50/60Hz electrical hum from audio recordings.
  • •When removing unwanted resonant frequencies or ringing sounds.
  • •For cleaning up audio tracks before editing or distribution to enhance quality.

How It Works

  • •Upload your audio file in a supported format like MP3, WAV, or AAC.
  • •Set the center frequency in Hz to target the specific problem band, such as 60Hz for hum.
  • •Adjust the bandwidth (Hz) to define the width of the frequency range and depth (dB) to control attenuation strength.
  • •Choose an output format and download the processed audio file.

Use Cases

Removing background hum from podcast or interview recordings.
Cleaning up audio in video production to eliminate electrical interference.
Enhancing music tracks by cutting unwanted resonant frequencies for better sound quality.

Examples

1. Remove 60Hz Hum from Podcast Recording

Podcast Producer
Background
A podcast episode recorded in a studio with electrical equipment introduces a persistent 60Hz hum.
Problem
The hum is audible throughout the recording, distracting listeners and reducing audio quality.
How to Use
Upload the audio file, set center frequency to 60Hz, bandwidth to 10Hz, depth to -30dB, and output format to MP3.
Outcome
The hum is significantly reduced, resulting in a clean and professional audio track ready for publishing.

2. Eliminate 440Hz Ringing in Guitar Track

Musician
Background
A recorded guitar track has an unwanted ringing sound at 440Hz due to room acoustics or equipment resonance.
Problem
The ringing masks the desired guitar tone and needs to be removed without affecting the overall sound.
How to Use
Upload the file, set center frequency to 440Hz, bandwidth to 5Hz, depth to -20dB, and export as WAV for high quality.
Outcome
The ringing is effectively removed, preserving the natural tone of the guitar for a cleaner mix.

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 file formats can I upload?

The tool accepts any audio format supported by your browser, including MP3, WAV, AAC, and others.

How do I determine the correct center frequency to remove?

Common hum frequencies are 50Hz or 60Hz depending on your region. Use audio analysis software to identify exact frequencies if needed.

What does the bandwidth setting control?

Bandwidth defines the width of the frequency band around the center that will be attenuated. A narrower bandwidth targets a more specific range.

Is there a file size limit for uploads?

Yes, the maximum file size is 200MB. Larger files cannot be processed with this tool.

What output formats are available?

You can choose from MP3, AAC, M4A, OGG Vorbis, Opus, FLAC, or WAV formats.

API Documentation

Request Endpoint

POST /en/api/tools/audio-notch-filter

Request Parameters

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

File type parameters need to be uploaded first via POST /upload/audio-notch-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-notch-filter": {
      "name": "audio-notch-filter",
      "description": "Remove a very narrow frequency band (e.g., hum)",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=audio-notch-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]