# Audio LUFS Meter

Measure integrated, short-term, and momentary LUFS

> Canonical page: https://elysiatools.com/en/tools/audio-lufs-meter

- **Category:** Media

- **Keywords:** audio, lufs, ebur128, loudness, meter, analysis

## Overview

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

## Inputs

- **Audio File** (file): Select an audio file

## 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.

## Frequently asked questions

### 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.

## Related tools

- [Audio Loudness Report (LUFS)](https://elysiatools.com/en/tools/audio-loudness-report): Generate a report on the loudness (LUFS) and dynamic range
- [Audio Platform Delivery Checker](https://elysiatools.com/en/tools/audio-platform-delivery-checker): Check podcast or spoken-audio files against platform delivery profiles, including codec, loudness, metadata, chapters, cover art, and decodability.
- [Audio True Peak Meter](https://elysiatools.com/en/tools/audio-true-peak-meter): Analyze audio to find true peak level
- [Audio Dropout Detector](https://elysiatools.com/en/tools/audio-dropout-detector): Detect brief signal dropouts and silent gaps in audio
- [Audio Dynamic Range Meter](https://elysiatools.com/en/tools/audio-dynamic-range-meter): Compute dynamic range via crest factor (peak minus RMS)
- [Audio Dynamic Range Report](https://elysiatools.com/en/tools/audio-dynamic-range-report): Analyze and report on the dynamic range of an audio file
- [Audio Repair Audit Report](https://elysiatools.com/en/tools/audio-repair-audit-report): Audit an audio file and recommend repair tools
- [Audio Silence Map](https://elysiatools.com/en/tools/audio-silence-map): Output silence intervals as JSON and CSV

## 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 Loudness, Dynamics, and Mastering Delivery](https://elysiatools.com/en/hubs/audio-mastering-loudness-workflows): Measure LUFS, true peak, and dynamics, apply suitable control, and verify podcast, broadcast, or music audio before delivery.
- [Audio Measurement and Inspection](https://elysiatools.com/en/hubs/audio-analyze): Measure loudness, peaks, dynamics, musical descriptors, spectrum, and metadata before mastering, publishing, or archiving audio.