Technical specifications

EBU and ATSC standards

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

Surround channel order

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)