# Audio Multi-band Compressor

Apply compression to specific frequency bands (3-band crossover + compressors)

> Canonical page: https://elysiatools.com/en/tools/audio-multi-band-compressor

- **Category:** Media

- **Keywords:** audio, compressor, multiband, crossover

## Overview

The Audio Multi-band Compressor applies dynamic compression to specific frequency bands in audio files using a 3-band crossover. It allows you to adjust parameters like threshold, ratio, and timing to control dynamics in low, mid, and high frequencies for a balanced sound.

## Inputs

- **Audio File** (file): Select an audio file
- **Crossover 1 (Hz)** (number): 200
- **Crossover 2 (Hz)** (number): 4000
- **Threshold (dB)** (number): -18
- **Ratio** (number): 2.5
- **Attack (ms)** (number): 10
- **Release (ms)** (number): 120
- **Makeup Gain (dB)** (number): 0
- **Output Format** (select)

## When to use

- When mastering music to manage volume inconsistencies across frequency ranges.
- When editing podcasts or voice recordings to reduce loudness variations and improve clarity.
- When processing audio for broadcast or streaming to achieve consistent loudness levels.

## How it works

- Upload an audio file in a supported format (e.g., MP3, WAV).
- Set crossover frequencies to divide the audio into three bands: low, mid, and high.
- Adjust compression settings such as threshold, ratio, attack, release, and makeup gain.
- Choose an output format and download the processed audio file.

## Use cases

- Mastering a music track to balance bass and treble levels.
- Processing a podcast episode to make voice audio more consistent.
- Enhancing a live recording by compressing dynamic range in specific frequency bands.

## Frequently asked questions

### What audio file formats can I upload?

You can upload audio files in formats like MP3, WAV, AAC, and others, as long as they are under 200 MB.

### How do crossover frequencies work?

Crossover 1 (default 200 Hz) splits low and mid frequencies, and Crossover 2 (default 4000 Hz) splits mid and high frequencies, defining the bands for compression.

### Can I apply different compression settings to each band?

No, the compression parameters (threshold, ratio, etc.) are applied uniformly to all bands. Use crossover points to target specific frequency ranges.

### What is the maximum file size allowed?

The maximum file size is 200 MB.

### What output formats are supported?

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

## Related tools

- [Audio Change Bitrate](https://elysiatools.com/en/tools/audio-change-bitrate): Re-encode audio to a new bitrate while keeping the same format
- [Audio Compressor](https://elysiatools.com/en/tools/audio-compressor): Apply dynamic range compression with configurable threshold, ratio, attack/release, and makeup gain
- [Audio Metadata Compress](https://elysiatools.com/en/tools/audio-metadata-compress): Compress or remove metadata and embedded artwork to reduce file size
- [Audio Time Stretch](https://elysiatools.com/en/tools/audio-time-stretch): Stretch or compress audio to a target duration
- [Convert GIF to WebM](https://elysiatools.com/en/tools/gif-to-webm): Convert GIF images to WebM video format with modern compression and web optimization
- [MP3 to WAV Converter](https://elysiatools.com/en/tools/mp3-to-wav): Convert MP3 audio to uncompressed WAV with optional resampling and channel selection
- [WAV Compress](https://elysiatools.com/en/tools/wav-compress): Compress a WAV file by converting to MP3, AAC, OGG, or Opus
- [Audio Band-Pass Filter](https://elysiatools.com/en/tools/audio-band-pass-filter): Allow only a specific band of frequencies to pass

## 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 Loudness, Dynamics, and Mastering Delivery](https://elysiatools.com/en/hubs/audio-mastering-loudness-workflows): Measure LUFS, true peak, and dynamics, apply suitable control, and verify podcast, broadcast, or music audio before delivery.