“APU Loudness Meter is a modern loudness analysis plug-in released by APU Software, LLC. This plug-in is designed to provide both real-time lmonitoring and full histogram analysis of your audio’s loudness over time. Here you can read about the different features and parameters available with the meter.
This software supports a variety of parameters, most of which can be adjusted in real-time. This section provides an overview of each parameter, with each subsection detailing the parameters for the associated tab in the user interface. From within the user interface, you can also hover the mouse over a slider, combo-box, or checkbox to see a popup description of the parameter.”