# Audio Band-Pass Filter

Allow only a specific band of frequencies to pass

> Canonical page: https://elysiatools.com/en/tools/audio-band-pass-filter

- **Category:** Media

- **Keywords:** audio, filter, bandpass, band-pass

## Overview

Keeps a chosen band centered around a frequency while attenuating frequencies outside that band.

## Inputs

- **Audio File** (file): Select an audio file
- **Center Frequency (Hz)** (number): 1000
- **Bandwidth (Hz)** (number): 200
- **Output Format** (select)

## When to use

- When you need to remove unwanted low or high frequencies from an audio recording to reduce noise.
- When isolating a specific frequency range for analysis, such as in speech or music editing.
- When preparing audio for systems that require a narrow frequency band, like telecommunications or hearing aids.

## How it works

- Upload an audio file in a supported format, such as MP3, WAV, or AAC.
- Set the center frequency (default 1000 Hz) and bandwidth (default 200 Hz) to define the frequency band to retain.
- Choose an output format from options like MP3, FLAC, or WAV for the processed audio.
- The tool applies the filter, attenuating frequencies outside the specified band and generating the output file.

## Use cases

- Enhancing vocal clarity in podcasts by filtering out background noise outside the human voice range.
- Isolating instrument frequencies, such as bass or treble, in music production for remixing or analysis.
- Preparing audio for telecommunication systems that operate within specific frequency bands to improve signal quality.

## Frequently asked questions

### What audio file formats are supported for input?

The tool accepts common audio formats like MP3, WAV, AAC, and others via the audio file input.

### What is the default center frequency and bandwidth?

The default center frequency is 1000 Hz, and the default bandwidth is 200 Hz.

### Can I process multiple audio files at once?

No, the tool processes one audio file at a time, as the input is set to a single file.

### What output formats are available?

You can choose from MP3, AAC, M4A, OGG Vorbis, Opus, FLAC, or WAV for the output.

### How does adjusting the bandwidth affect the filter?

The bandwidth defines the width of the frequency band around the center frequency; a narrower bandwidth isolates a smaller range, while a wider one includes more frequencies.

## Related tools

- [Audio Add Silence](https://elysiatools.com/en/tools/audio-add-silence): Add a specified duration of silence to the start or end of an audio file
- [Audio Fade In](https://elysiatools.com/en/tools/audio-fade-in): Apply a fade-in effect to the beginning of the audio
- [Audio Fade Out](https://elysiatools.com/en/tools/audio-fade-out): Apply a fade-out effect to the end of the audio
- [Audio High-Pass Filter](https://elysiatools.com/en/tools/audio-high-pass-filter): Apply a high-pass filter to remove low frequencies
- [Extract Left Channel](https://elysiatools.com/en/tools/audio-left-channel-extract): Extract only the left channel to a mono file
- [Audio Low-Pass Filter](https://elysiatools.com/en/tools/audio-low-pass-filter): Apply a low-pass filter to remove high frequencies
- [Audio Master Reference Match](https://elysiatools.com/en/tools/audio-master-reference-match): Match your mix's tonal balance and loudness to a reference track and export the corrected master, with a before/after third-octave band report.
- [Extract Right Channel](https://elysiatools.com/en/tools/audio-right-channel-extract): Extract only the right channel to a mono file

## Samples

- [Copyright-Free FLAC Audio Samples](https://elysiatools.com/en/samples/flac-samples): Lossless FLAC audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
- [Copyright-Free MP3 Audio Samples](https://elysiatools.com/en/samples/mp3-samples): Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio
- [Copyright-Free WAV Audio Samples](https://elysiatools.com/en/samples/wav-samples): Uncompressed PCM WAV audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
- [Copyright-Free Raw PCM Audio Samples](https://elysiatools.com/en/samples/pcm-samples): Raw PCM s16le audio samples featuring nature ambience and relaxing music for waveform, playback, and conversion workflows