# Audio Reverse Reverb

Apply a reverb effect that builds up before the sound

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

- **Category:** Media

- **Keywords:** audio, reverb, reverse, backwards, build-up, effect, sound design

## Overview

Creates a dramatic "reverse" reverb effect where the reverb builds up before the main sound hits. Commonly used in film scoring, electronic music, and creative sound design.

## Inputs

- **Audio File** (file): Select an audio file
- **Build-up Time (0.1-5.0s)** (range): Duration of reverb build-up before the main sound. Longer = more dramatic entrance.
- **Decay Time (0.5-10.0s)** (range): Duration of reverb tail after the main sound. Longer = more spacious decay.
- **Wet/Dry Mix (0-1.0)** (range): Balance between dry (original) and wet (reverse reverb) signal.
- **Output Format** (select)

## When to use

- When designing dramatic sound effects for film or video to build tension before key moments.
- For creating anticipatory build-ups in electronic music tracks, such as before drops or choruses.
- To add creative reverb tails that precede the original sound in audio samples for unique textures.

## How it works

- Upload an audio file in supported formats like MP3, WAV, or AAC.
- Adjust the build-up time slider to set the duration of the reverb swell before the sound.
- Set the decay time to control how long the reverb tail lasts after the sound.
- Balance the wet/dry mix to blend the reverse reverb effect with the original audio.

## Use cases

- Enhancing vocal entrances in pop or rock music to add emotional anticipation.
- Creating eerie atmospheres in horror film soundtracks by preceding sounds with reverb build-ups.
- Adding depth and suspense to drum hits or synth leads in electronic dance music.

## Frequently asked questions

### What audio file formats are supported?

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

### How can I make the reverse reverb effect more intense?

Increase the wet/dry mix value towards 1.0 to emphasize the effect over the original audio.

### What is the maximum file size I can upload?

The maximum file size is 200 MB.

### Is this tool suitable for real-time audio processing?

No, it processes uploaded audio files and is not designed for real-time use.

### How does adjusting the build-up time change the sound?

A longer build-up time creates a more gradual and dramatic swell of reverb before the main sound.

## Related tools

- [Audio Bitcrusher](https://elysiatools.com/en/tools/audio-bitcrusher): Reduce the sample rate and bit depth for a lo-fi effect
- [Audio Channel Swap](https://elysiatools.com/en/tools/audio-channel-swap): Swap the left and right channels of a stereo file
- [Audio Chorus](https://elysiatools.com/en/tools/audio-chorus): Apply a chorus effect
- [Audio Flanger](https://elysiatools.com/en/tools/audio-flanger): Apply a flanger effect
- [Audio Gated Reverb](https://elysiatools.com/en/tools/audio-gated-reverb): Apply a reverb effect that is cut off abruptly
- [Audio Hall Reverb](https://elysiatools.com/en/tools/audio-hall-reverb): Add a reverb effect simulating a large hall
- [Audio Phaser](https://elysiatools.com/en/tools/audio-phaser): Apply a phaser effect
- [Audio Plate Reverb](https://elysiatools.com/en/tools/audio-plate-reverb): Add a reverb effect simulating a plate reverb unit

## 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 Reverb, Modulation, and Sound Design Effects Tools](https://elysiatools.com/en/hubs/audio-sound-design-effects): Choose, preview, compare, and verify reverb, delay, modulation, and character effects for music, video, podcast, and game sound design.