APU Software released APU Loudness Meter for free

The APU Loudness Meter plug-in is a free dynamic range analysis tool supporting a variety of loudness types (LUFS, True Peak, RMS, Peak). View changes to your audio’s loudness in real-time or get a bigger-picture look with configurable history and histogram views. View both real-time and accumulated statistical information all from one screen.

If you’re going to spend time using a loudness meter, it might as well be pleasant to look at. Real-time visuals are powered by hand-written OpenGL fragment shaders, providing beautiful iterative graphics which leave a trail of your audio’s loudness history in its wake.

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More info and free download here: APU Software | Loudness Meter