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Audio LUFS Meter

Measure integrated, short-term, and momentary LUFS

Runs FFmpeg ebur128 to report LUFS metrics aligned with broadcast standards.

Click to upload file or drag and drop file here

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

Key Facts

Category
Media
Input Types
file
Output Type
json
Sample Coverage
4
API Ready
Yes

Overview

The Audio LUFS Meter measures the loudness of audio files using the EBU R128 standard. It calculates integrated, short-term, and momentary LUFS values to help ensure broadcast and streaming compliance.

When to Use

  • •When preparing audio for broadcast television or radio to meet loudness regulations.
  • •To normalize podcast episodes for consistent listener experience.
  • •During audio post-production to check and adjust loudness levels in mixes.

How It Works

  • •Upload an audio file in a supported format such as MP3 or WAV.
  • •The tool runs FFmpeg's ebur128 filter to analyze the audio.
  • •It outputs a JSON report with integrated, short-term, and momentary LUFS measurements.

Use Cases

Ensuring TV commercials comply with EBU R128 broadcast standards.
Normalizing loudness across podcast episodes for platforms like Spotify.
Checking audio mix levels in music production before mastering.

Examples

1. Broadcast Compliance Check

Broadcast Engineer
Background
A broadcast engineer is finalizing audio for a TV commercial to air on national television.
Problem
The audio must meet EBU R128 loudness standards to avoid broadcast violations.
How to Use
Upload the commercial's audio file to the Audio LUFS Meter.
Outcome
The tool outputs integrated LUFS values, allowing the engineer to verify compliance and make adjustments if needed.

2. Podcast Episode Normalization

Podcast Producer
Background
A podcast producer notices that episodes have inconsistent loudness, causing listener complaints.
Problem
Episodes vary in loudness, leading to a poor listening experience on streaming platforms.
How to Use
Measure each episode's audio file using the LUFS Meter to get integrated LUFS readings.
Outcome
Based on the results, the producer normalizes audio levels to a target LUFS, such as -16 LUFS, for consistent playback.

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 is LUFS?

LUFS stands for Loudness Units Full Scale, a standard for measuring audio loudness.

What audio formats are supported?

The tool supports common audio formats like MP3, WAV, AAC, and others via the audio/* file type.

How is LUFS different from dB?

LUFS measures perceived loudness over time, while dB often measures peak or RMS levels.

Can I measure multiple files at once?

Currently, the tool processes one audio file at a time.

What do the different LUFS metrics mean?

Integrated LUFS is the overall loudness, short-term is over 3 seconds, and momentary is over 400 milliseconds.

API Documentation

Request Endpoint

POST /en/api/tools/audio-lufs-meter

Request Parameters

Parameter Name Type Required Description
audioFile file (Upload required) Yes -

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

Response Format

{
  "key": {...},
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}
JSON Data: JSON Data

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-audio-lufs-meter": {
      "name": "audio-lufs-meter",
      "description": "Measure integrated, short-term, and momentary LUFS",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=audio-lufs-meter",
      "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]