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Audio Beat Matcher

Adjust tempo to match a target BPM

Uses BPM ratio (target ÷ source) to time-stretch with atempo while keeping pitch; can auto-detect source BPM via MusicTempo.

Click to upload file or drag and drop file here

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

Leave empty to auto-detect

Key Facts

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

Overview

The Audio Beat Matcher adjusts the tempo of audio files to match a target BPM using time-stretching with atempo, preserving pitch. It can auto-detect the source BPM via MusicTempo or use a user-provided value.

When to Use

  • •When synchronizing multiple tracks for DJ mixes or live performances to ensure seamless transitions.
  • •For aligning background music with video edits to match scene rhythms in post-production.
  • •To standardize BPM in music libraries for dance classes or fitness routines requiring consistent beats.

How It Works

  • •Upload an audio file in a supported format like MP3, WAV, or AAC.
  • •Enter the source BPM manually or leave it blank for automatic detection using MusicTempo.
  • •Specify the target BPM between 40 and 240, with a default of 128.
  • •Select an output format such as MP3, FLAC, or WAV and download the adjusted audio file.

Use Cases

Matching tempos for DJ sets to enable smooth beatmatching during performances.
Synchronizing audio with video clips in editing software for cohesive multimedia projects.
Creating workout playlists with uniform BPM for rhythm-based exercise routines.

Examples

1. Preparing Tracks for a Club DJ Set

DJ
Background
A DJ is curating a set for a nightclub and needs all tracks to have the same BPM for easy mixing.
Problem
The selected tracks have varying BPMs, making manual beatmatching time-consuming and prone to errors.
How to Use
Upload each track, set the target BPM to 120 (the desired tempo), and use auto-detection for source BPM or enter it if known.
Example Config
audioFile: track.mp3, sourceBpm: auto-detect, targetBpm: 120, outputFormat: mp3
Outcome
All tracks are adjusted to 120 BPM, allowing for seamless transitions and a cohesive DJ set.

2. Syncing Music with Video Footage

Background
A video editor is working on a short film where the background music must align with the visual pacing.
Problem
The original audio BPM does not match the video's rhythm, resulting in a disjointed viewing experience.
How to Use
Upload the audio file, specify the target BPM based on the video's tempo (e.g., 130 BPM), and choose a high-quality output format like WAV.
Outcome
The audio tempo is matched to the video, creating a synchronized and professional final edit.

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 are supported for upload?

You can upload audio files in common formats like MP3, WAV, AAC, M4A, OGG, Opus, and FLAC, as indicated by the audio/* file type.

How accurate is the auto-detection of source BPM?

The tool uses the MusicTempo algorithm to estimate BPM, which is generally reliable for most music but may vary with complex audio.

Does adjusting tempo affect the audio pitch?

No, the tool uses atempo for time-stretching, which changes speed without altering pitch.

What is the range for target BPM?

Target BPM can be set between 40 and 240, with a default value of 128.

Can I process multiple files at once?

No, the tool processes one audio file at a time, as indicated by the single file upload option.

API Documentation

Request Endpoint

POST /en/api/tools/audio-beat-matcher

Request Parameters

Parameter Name Type Required Description
audioFile file (Upload required) Yes -
sourceBpm number No Leave empty to auto-detect
targetBpm number No -
outputFormat select No -

File type parameters need to be uploaded first via POST /upload/audio-beat-matcher 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-beat-matcher": {
      "name": "audio-beat-matcher",
      "description": "Adjust tempo to match a target BPM",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=audio-beat-matcher",
      "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]