Loudness vocabulary cheat sheet

One-page reference: peak vs RMS vs LUFS, the LUFS/LKFS/LU distinction, the three meter windows (M/S/I), how ITU-R BS.1770 computes LUFS (K-weighting + gating), LRA, True Peak (dBTP), and the numbers worth memorising (-23 LUFS, -24 LKFS, -1 dBTP).

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Book cover: Audio for Video, Volume 4 of the Fora Soft Video Engineering Handbook

The book · Volume 4 of 7

Audio for Video: A Complete Guide to Sound in Video Products: From PCM and Codecs to Loudness, Accessibility, and Real-Time Voice Processing

This loudness vocabulary cheat sheet defines peak, RMS and LUFS, the three meter windows, how BS.1770 gates measurement, LRA and true peak. Volume 4 takes these terms into practice: sampling and dynamic range, loudness targets, codecs and real-time voice processing such as AGC. Written by Nikolay Sapunov, CEO at Fora Soft.

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