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Audio Crossfade Batch

Batch concatenate audio files with automatic crossfades

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

Click to upload files or drag and drop files here

Maximum file size: 200MB Maximum files: 20
Supported formats: audio/*

Key Facts

Category
Media
Input Types
file, number, select
Output Type
file
Sample Coverage
4
API Ready
Yes

Overview

The Audio Crossfade Batch tool enables you to merge multiple audio files into a single track with smooth, automatic crossfades between each segment. It's designed for creating seamless audio mixes or playlists without manual editing.

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.

Examples

1. Podcast Episode Compilation

Podcast Producer
Background
You have recorded separate segments for a podcast episode, including intro, interview, and outro files.
Problem
Manually editing these segments to add crossfades is time-consuming and requires specialized software.
How to Use
Upload all segment files, set the crossfade duration to 1.5 seconds, and choose MP3 as the output format.
Outcome
A single MP3 podcast episode with smooth transitions between sections, ready for publishing.

2. Live Stream Audio Mix

DJ
Background
For a live stream, you need to combine several music tracks into a continuous mix without interruptions.
Problem
Concatenating tracks directly results in jarring cuts that disrupt the listening experience.
How to Use
Select the audio files, adjust the crossfade to 3 seconds for a gentle blend, and output in high-quality FLAC format.
Outcome
A seamless audio mix that plays continuously during the stream, enhancing audience engagement.

Try with Samples

audio, file
Copyright-Free AAC Audio Samples
High-quality AAC encoded audio samples for testing and development, featuring nature sounds and meditation music with excellent compression
title token audio
audio
Copyright-Free MP3 Audio Samples
Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio
title token audio
audio
Copyright-Free WAV Audio Samples
Uncompressed PCM WAV audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
title token audio
audio
Copyright-Free OGG Vorbis Audio Samples
Open-source OGG Vorbis audio samples for testing and development, featuring excellent compression with nature sounds and meditation music
title token audio
audio

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FAQ

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.

API Documentation

Request Endpoint

POST /en/api/tools/audio-crossfade-batch

Request Parameters

Parameter Name Type Required Description
audioFiles file (Upload required) Yes -
crossfadeDuration number No -
outputFormat select No -

File type parameters need to be uploaded first via POST /upload/audio-crossfade-batch to get filePath, then pass filePath to the corresponding file field.

Response Format

{
  "filePath": "/public/processing/randomid.ext",
  "fileName": "output.ext",
  "contentType": "application/octet-stream",
  "size": 1024,
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}
File: File

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-audio-crossfade-batch": {
      "name": "audio-crossfade-batch",
      "description": "Batch concatenate audio files with automatic crossfades",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=audio-crossfade-batch",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

Supports URL file links or Base64 encoding for file parameters.

If you encounter any issues, please contact us at [email protected]