# Audio Low-Pass Filter

Apply a low-pass filter to remove high frequencies

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

- **Category:** Media

- **Keywords:** audio, filter, lowpass, hpf, remove highs

## Overview

Rolls off high frequencies above the cutoff to soften brightness or remove hiss.

## Inputs

- **Audio File** (file): Select an audio file
- **Cutoff Frequency (Hz)** (number): 8000
- **Order (slope)** (number): 1
- **Output Format** (select)

## When to use

- When you need to remove high-frequency hiss or noise from audio recordings.
- When you want to make audio sound less bright and more balanced.
- When preparing audio for playback on systems with limited high-frequency response.

## How it works

- Upload your audio file in a supported format like MP3, WAV, or FLAC.
- Set the cutoff frequency in Hz to define where the filter begins attenuating highs.
- Adjust the filter order to control the steepness of the frequency roll-off.
- Select the output format and process the file to download the filtered audio.

## Use cases

- Cleaning up podcast audio by reducing background hiss or microphone noise.
- Softening harsh vocal recordings in music production for a warmer mix.
- Adapting audio files for telephone systems or devices with limited frequency range.

## Frequently asked questions

### What audio file formats can I upload?

You can upload any audio file, as the tool supports audio/* formats.

### What is the default cutoff frequency?

The default cutoff frequency is 8000 Hz.

### How does the filter order affect the audio?

The order determines the steepness of the frequency roll-off; higher orders provide a sharper cut.

### What output formats are available?

Output formats include MP3, AAC, M4A, OGG Vorbis, Opus, FLAC, and WAV.

### Is there a limit on file size?

Yes, the maximum file size is 200 MB.

## Related tools

- [Audio Filler Word Removal Map](https://elysiatools.com/en/tools/audio-filler-word-removal-map): Combine a timestamped transcript with the audio to mark filler words (um, uh, 嗯, 那个…) and optionally mute or remove them.
- [Audio High-Pass Filter](https://elysiatools.com/en/tools/audio-high-pass-filter): Apply a high-pass filter to remove low frequencies
- [Karaoke Vocal Reducer](https://elysiatools.com/en/tools/audio-karaoke-track): Attempt to remove vocals from a stereo track
- [Audio Noise Gate](https://elysiatools.com/en/tools/audio-noise-gate): Apply a noise gate to remove low-volume noise
- [Audio Breath Control Editor](https://elysiatools.com/en/tools/audio-breath-control-editor): Detect breaths in speech and naturally crossfade to reduce, remove, or keep them.
- [Audio Hum Harmonic Remover](https://elysiatools.com/en/tools/audio-hum-harmonic-remover): Remove 50/60Hz electrical hum and harmonic buzz from audio recordings.
- [Audio Hum Removal](https://elysiatools.com/en/tools/audio-hum-removal): Remove electrical hum (50/60Hz and harmonics) from audio
- [Audio Metadata Compress](https://elysiatools.com/en/tools/audio-metadata-compress): Compress or remove metadata and embedded artwork to reduce file size

## 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

## Related content

- [Audio Restoration, Noise Repair, and Cleanup Tools](https://elysiatools.com/en/hubs/audio-restoration-repair-workflows): Diagnose and repair clicks, hum, clipping, crackle, room sound, hiss, and harshness without promising lossless restoration.