From Orban: Orban Loudness Meter is a software accepts two-channel stereo inputs and displays instantaneous peaks, VU, PPM, CBS Technology Center loudness, ITU BS.1770-2, EBU R 128 loudness, and Reconstructed 8x Over-Sampled Peaks. All meters include peak-hold functionality that makes the peak indications of the meters easy to see. The VU and PPM meters are split to indicate the left and right channels. The PPM and VU meters also displays the instantaneous peak values of the L and R digital samples. Logging to text files for importing into spreadsheet or graphing software is supported.
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