# Audio Crossfade Batch

Batch concatenate audio files with automatic crossfades

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

- **Category:** Media

- **Keywords:** audio, crossfade, batch, concat, mix

## Overview

Concatenates multiple files and applies a consistent crossfade between each pair.

## Inputs

- **Audio Files (2-20)** (file): Select multiple audio files
- **Crossfade Duration (s)** (number): 2
- **Output Format** (select)

## When to use

- When combining several audio recordings to eliminate abrupt cuts or silence between tracks.
- For producing continuous mixes, such as DJ sets or podcast episodes, from individual files.
- To prepare audio for events, videos, or presentations where professional transitions are needed.

## How it works

- Upload your audio files (2 to 20 files, each up to 200MB in common formats like MP3 or WAV).
- Set the crossfade duration between 0.1 and 30 seconds (default is 2 seconds) for smooth transitions.
- Select an output format from options including MP3, AAC, FLAC, WAV, and others.
- Process the batch to generate a single concatenated audio file with consistent crossfades applied.

## Use cases

- Creating a seamless DJ mix by concatenating individual track files with crossfades.
- Joining podcast segments or interview clips into a single episode for easy distribution.
- Combining background music tracks for a video project or live event to avoid playback gaps.

## Frequently asked questions

### What audio file formats can I upload?

The tool supports common audio formats like MP3, WAV, AAC, and others, as indicated by the 'audio/*' file type.

### How many audio files can I process at once?

You can upload between 2 and 20 audio files per batch, with each file up to 200MB.

### Can I customize the crossfade length?

Yes, you can adjust the crossfade duration from 0.1 to 30 seconds, with a default of 2 seconds.

### What output formats are available?

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

### Is there a limit on individual file size?

Yes, each audio file must be 200MB or smaller to ensure smooth processing.

## Related tools

- [Audio Concat](https://elysiatools.com/en/tools/audio-concat): Concatenate audio files in a specified order
- [Audio Crossfade](https://elysiatools.com/en/tools/audio-crossfade): Apply a crossfade between two audio files
- [Audio Crossfade Merge](https://elysiatools.com/en/tools/audio-crossfade-merge): Merge audio files with a crossfade effect between them
- [Audio Mixer](https://elysiatools.com/en/tools/audio-mixer): Mix two audio files together with customizable timing control
- [Batch Audio Rename](https://elysiatools.com/en/tools/audio-batch-rename): Batch rename audio files using patterns, text replacement, numbering, and case conversion. Returns renamed files as a ZIP download.
- [Duplicate Audio Library Finder](https://elysiatools.com/en/tools/audio-duplicate-library-finder): Find exact and near-duplicate audio across uploaded files or a ZIP, including copies saved with different codecs.
- [Audio Mix](https://elysiatools.com/en/tools/audio-mix): Mix multiple audio tracks together with adjustable volumes
- [Audio Punch In/Out](https://elysiatools.com/en/tools/audio-punch-in-out): Replace a segment of audio with another clip

## 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

- [Seamless Audio Loops, Ambience, and Rhythm Beds](https://elysiatools.com/en/hubs/seamless-audio-loops-ambience-and-rhythm-beds): Find clean loop seams, generate or extend ambience, align musical timing, and finish repeatable audio beds with fades, crossfades, and tempo-synced motion.