Loudness control in broadcasts

I was an interesting article (written in Finnish) on AV-Visio 2/2013 on-line magazine about EBU – Recommendation R 128. In Finland the public broadcasting company YLE and biggest TV companies start to use that new practice this year on their channels. Similar standards on subjective audio volume control is in use USA and Canada.

EBU R128 tells how broadcasters can measure and normalise audio using Loudness meters instead of Peak Meters (PPMs) only, as has been common practice. Basically EBU R128 recommends to normalize audio at -23 LUFS +/- 1 LU, measured with a relative gate at -10 LU. The metering approach can be used with virtually all material.

Loudness On the way to nirvana — audio levelling with EBU R 128 article is an introduction to R128 in English. For more details check also links at EBU GROUP on LOUDNESS (PLOUD) web page and Loudness and the EBU R128 Broadcast Standard videos.

FreeLCS (Free Loudness Correction Server) is a free software that lets users easily have their audio files loudness corrected according to the EBU R128 loudness recommendation. FreeLCS uses other open source programs to get the job done (Linux, libebur128, gnuplot, FFmpeg, sox, mediainfo).

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