Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category: Media
Input types: file, select
Output type: file
Sample coverage: 4
API ready: Yes

Overview

The Audio LUFS Normalizer adjusts audio files to meet specific loudness standards measured in LUFS (Loudness Units Full Scale). It uses FFmpeg's loudnorm filter to normalize audio to preset targets for podcasts (-16 LUFS), streaming (-14 LUFS), or broadcast (-23 LUFS), ensuring consistent volume levels across platforms.

When to use

When preparing audio episodes for podcast distribution to comply with industry loudness standards.
When uploading music or audio to streaming services that require specific LUFS levels for optimal playback.
When producing audio for broadcast television or radio to meet regulatory loudness requirements.

How it works

1Upload your audio file in a supported format such as MP3, WAV, or AAC.
2Select the target LUFS standard: Podcast (-16 LUFS), Streaming (-14 LUFS), or Broadcast (-23 LUFS).
3Choose the desired output format from options like MP3, AAC, FLAC, or others.
4The tool processes the audio using FFmpeg's loudnorm filter and provides a normalized file for download.

Use cases

Podcasters normalizing episode audio to -16 LUFS for a consistent listener experience.
Musicians preparing tracks for streaming platforms that recommend -14 LUFS.
Broadcast engineers ensuring audio meets -23 LUFS standards for television or radio transmission.

Examples

1. Normalize Podcast Episode

Podcast Producer

Background

A podcast producer has recorded an episode with varying loudness levels that need standardization for distribution.

Problem

The audio has inconsistent volume, with some sections too loud and others too quiet, affecting listener comfort.

How to use

Upload the audio file 'episode_raw.mp3', select 'Podcast -16 LUFS' as the target standard, and choose 'MP3' as the output format.

Outcome

The normalized audio file 'episode_normalized.mp3' is downloaded, with consistent loudness at -16 LUFS.

2. Prepare Music for Streaming

Independent Artist

Background

An artist is uploading their latest track to a streaming service that requires audio normalized to -14 LUFS.

Problem

The original track has peaks exceeding the recommended loudness, risking distortion or rejection by the platform.

How to use

Upload 'track_master.wav', select 'Streaming -14 LUFS', and output as 'AAC' format.

Outcome

The tool outputs 'track_normalized.aac' with loudness adjusted to -14 LUFS, ready for upload.

FAQ

What is LUFS?

LUFS stands for Loudness Units Full Scale, a standard for measuring audio loudness used in broadcasting and streaming to ensure consistent volume levels.

What audio formats are supported for input?

The tool accepts any audio file format supported by FFmpeg, including MP3, WAV, AAC, OGG, and more.

Is there a file size limit?

Yes, the maximum file size is 200 MB (209715200 bytes).

Can I choose a custom LUFS target?

No, the tool uses preset targets for podcast (-16 LUFS), streaming (-14 LUFS), and broadcast (-23 LUFS). Custom targets are not supported.

How long does normalization take?

Processing time depends on the file size and length, but it typically completes within a few minutes for standard audio files.

Audio LUFS Normalizer

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Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Normalize Podcast Episode

2. Prepare Music for Streaming

FAQ

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