Audio Normalizer

AudioFactory - Code Plugins - Nov 24, 2022

Batch non-destructive loudness normalization of MetaSoundSources, SoundCues and SoundWaves

  • Supported Platforms
  • Supported Engine Versions
    5.0 - 5.4
  • Download Type
    Engine Plugin
    This product contains a code plugin, complete with pre-built binaries and all its source code that integrates with Unreal Engine, which can be installed to an engine version of your choice then enabled on a per-project basis.

Save countless hours and let your computer work for you by using the latest industry standard algoryhtms to automatically normalize hundreds or even thousands of sounds with a few clicks!

Also supports procedural sounds such as MetaSounds and SoundCues!

Quick Tour (2 min):

Full Tech Overview (13 min):

The first step in a good audio mix is normalization, meaning balancing the volumes of all the individual sound sources to get them within the same loudness level.

To create this plugin, a custom implementation of the LUFS measuring system was developed for Unreal Engine. LUFS is the new industry standard for measuring loudness based on the human ear perception and is the main driving force behind the normalization system.


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Support E-Mail: [email protected]

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Based on industry standards and best practices published by Sony® and Audiokinetic®, and on the LUFS industry standard published by the International Telecomunication Union. (No affiliation)

Technical Details


  • Batch normalization of procedural and linear audio assets (MetaSoundSources, SoundCues and SoundWaves).
  • Non-destructive normalization, only modifying the output volume level and not the sound data itself.
  •  Automatically filter out SoundWaves used within other selected MetaSoundSources or SoundCues, to preserve their internal balance.
  •  Basic and advanced settings for target loudless levels and accuracy level.

Code Modules:

  •  AudioNormalization (Editor)

Number of Blueprints: 2 Widget Blueprints

Number of C++ Classes: 1

Network Replicated: No (for local use only).

Supported Development Platforms: Windows, Mac, Linux.

Supported Target Build Platforms: Editor only.


LUFS measuring algorythm paper:!!PDF-E.pdf