# Audio Loudness Report (LUFS)

Generate a report on the loudness (LUFS) and dynamic range

> Canonical page: https://elysiatools.com/en/tools/audio-loudness-report

- **Category:** Media

- **Keywords:** audio, loudness, lufs, dynamic range, analysis, ffmpeg

## Overview

Runs FFmpeg loudnorm analysis to report integrated loudness, true peak, and LRA.

## Inputs

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

## When to use

- When you need to verify audio loudness against broadcast standards like EBU R128 or streaming platform guidelines.
- When preparing audio for distribution to ensure consistent volume levels across episodes or tracks.
- When analyzing the dynamic range of recordings during mixing or mastering for quality control.

## How it works

- Upload an audio file in a supported format such as MP3, WAV, or FLAC.
- The tool runs FFmpeg's loudnorm filter to analyze the audio.
- It extracts integrated loudness, true peak, and LRA values from the analysis.
- Outputs a JSON report containing these loudness metrics for review.

## Use cases

- Broadcast engineers checking audio files for TV or radio compliance with loudness regulations.
- Podcast producers ensuring episodes meet platform-specific loudness recommendations like those from Spotify or Apple Podcasts.
- Audio engineers analyzing dynamic range during post-production to optimize track mastering.

## Frequently asked questions

### What audio formats are supported?

The tool supports common audio formats like MP3, WAV, FLAC, and others compatible with FFmpeg.

### What does LUFS stand for?

LUFS means Loudness Units Full Scale, a standard measure of perceived loudness used in broadcasting.

### Can this tool normalize or adjust audio loudness?

No, this tool only reports loudness metrics; it does not modify the audio file.

### How accurate is the loudness measurement?

It uses FFmpeg's loudnorm filter, which implements industry-standard algorithms for precise loudness analysis.

### Is there a file size limit for uploads?

Yes, the audio file must be under 200 MB, as specified in the tool options.

## Related tools

- [Audio Fingerprint Generator](https://elysiatools.com/en/tools/audio-fingerprint-generator): Generate an acoustic fingerprint of an audio file
- [Audio Silence Report](https://elysiatools.com/en/tools/audio-silence-report): Generate a report of silent sections in an audio file
- [Audio BPM Detector](https://elysiatools.com/en/tools/audio-bpm-detector): Detect the beats per minute (BPM) of a music track
- [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 Key Detector](https://elysiatools.com/en/tools/audio-key-detector): Detect the musical key of a track
- [Audio LUFS Meter](https://elysiatools.com/en/tools/audio-lufs-meter): Measure integrated, short-term, and momentary LUFS

## 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 Preview, Tone, and Effect Generator Tools](https://elysiatools.com/en/hubs/audio-generate): Compare audio preview generation, silence creation, ringtone building, fingerprinting, loudness reports, and effect-style audio generators in one hub.
- [Audio Loudness, Dynamics, and Mastering Delivery Tools](https://elysiatools.com/en/hubs/audio-mastering-loudness-workflows): Measure LUFS and true peak, normalize loudness, shape dynamics, and prepare podcast, broadcast, or music files for cleaner audio delivery in one mastering-focused hub.
- [Audio Encoding and Format Conversion Tools](https://elysiatools.com/en/hubs/audio-convert): Compare audio format conversion, bitrate changes, sample-rate conversion, codec swaps, and export tools in one hub for delivery and archive workflows.
- [Audio Editing and Cleanup Tools](https://elysiatools.com/en/hubs/audio-utility): Compare audio trimming, silence removal, fades, mixing, and denoise tools in one hub for podcast, voiceover, and music cleanup workflows.