# Audio Expander

Apply dynamic range expansion

> Canonical page: https://elysiatools.com/en/tools/audio-expander

- **Category:** Media

- **Keywords:** audio, expander, dynamics

## Overview

The Audio Expander applies dynamic range expansion to audio files, enhancing the difference between quiet and loud sounds for improved clarity and impact. It allows precise control over parameters like threshold, ratio, and timing to tailor the expansion effect.

## Inputs

- **Audio File** (file): Select an audio file
- **Threshold (dB)** (number): -40
- **Expansion Ratio** (number): 1.5
- **Attack (ms)** (number): 10
- **Release (ms)** (number): 120
- **Makeup Gain (dB)** (number): 0
- **Output Format** (select)

## When to use

- When audio recordings sound flat or lack dynamic contrast, such as in over-compressed podcasts.
- To improve speech intelligibility in voiceovers or dialogue for videos and films.
- For adding punch and presence to music tracks during mixing or mastering.

## How it works

- Upload an audio file in a supported format like MP3, WAV, or AAC.
- Adjust parameters including threshold, expansion ratio, attack, release, and makeup gain to control the expansion.
- Select the desired output format and process the file to apply dynamic range expansion.

## Use cases

- Enhancing podcast audio by making speech clearer and more dynamic for better listener engagement.
- Restoring natural dynamics in compressed music recordings, such as drums or vocals.
- Improving audio quality in video production, like dialogue in films or YouTube content.

## Frequently asked questions

### What is dynamic range expansion?

It increases the difference between quiet and loud parts of an audio signal, making sounds below a threshold quieter and those above louder.

### What audio formats can I upload?

The tool accepts common audio formats such as MP3, WAV, AAC, M4A, OGG, Opus, and FLAC.

### How do I set the expansion ratio?

The ratio controls expansion intensity; set it between 1 and 4, where higher values increase the dynamic range difference.

### What is makeup gain used for?

Makeup gain compensates for overall level changes after expansion, allowing you to adjust the output volume.

### Can I choose the output format?

Yes, you can select from formats like MP3, AAC, M4A, OGG, Opus, FLAC, or WAV for the processed file.

## Related tools

- [Audio Chorus](https://elysiatools.com/en/tools/audio-chorus): Apply a chorus effect
- [Audio Compressor](https://elysiatools.com/en/tools/audio-compressor): Apply dynamic range compression with configurable threshold, ratio, attack/release, and makeup gain
- [Audio Crossfade](https://elysiatools.com/en/tools/audio-crossfade): Apply a crossfade between two audio files
- [Audio De-Esser](https://elysiatools.com/en/tools/audio-de-esser): Reduce sibilance (harsh “s” sounds) using dynamic equalization
- [Audio Denoise Chain](https://elysiatools.com/en/tools/audio-denoise-chain): Apply a multi-step denoise chain with filters and optional RNNoise
- [Audio Dither](https://elysiatools.com/en/tools/audio-dither): Apply dithering during bit depth reduction
- [Audio Equalizer](https://elysiatools.com/en/tools/audio-equalizer): Apply a multi-band equalizer (EQ)
- [Audio Flanger](https://elysiatools.com/en/tools/audio-flanger): Apply a flanger effect

## 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