Technical loudness specifications

LevelNorm-EBU uses the official EBU R128 settings:

- ITU BS.1770-3 measurement, including -10 LU ‘background sound’ gate

- 0 LU = -23 LUFS

- Adjustment of the target level to 0 LU +/- 6 LU

LevelNorm-ATSC uses the 2009 version of the ATSC A/85 recommendation:

- ITU BS.1770-1 measurement, without relative gate

- 0 LU = -24 LKFS

- Adjustment of the target level to 0 LU +/- 6 LU

The LUFS measurement has a different weighting for the surround speakers. Therefore LevelNorm must know the channel order of multichannel files in your facility. There are three options:

- SMPTE/ITU (L-R-C-Lfe-Ls-Rs)

- Film (L-C-R-Ls-Rs-Lfe)

- DTS (L-R-Ls-Rs-C-Lfe)