When did LKFS become LUFS and why?
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LKFS (Loudness, K-weighted, relative to Full Scale) and LUFS (Loudness Units relative to Full Scale) refer to the exact same measurement of perceived audio loudness. The term LUFS was introduced by the European Broadcasting Union (EBU) in the EBU R128 recommendation (2010) to harmonize terminology with 'Loudness Units' (LU). The transition happened to create a global standard that moved away from peak-based metering toward 'equal-loudness' metering, preventing the 'Loudness Wars' in television and eventually streaming.
- 1.Use the terms interchangeably in modern production; 1 LKFS is exactly equal to 1 LUFS.
- 2.Target -23 LUFS or -24 LKFS/LUFS for broadcast delivery depending on your local regulatory body (EBU vs. ATSC).
- 3.Focus on 'Integrated Loudness' over the duration of the entire track to ensure compliance with modern streaming and broadcast standards.
- ×Budget meters may not include 'K-weighting' filters, leading to inaccurate readings in the low-end.
- ×Broadcast standards (BS.1770) have evolved through versions (v1 to v4); ensure your plugin is updated to the latest version to include the 'Gating' function.
While LKFS and LUFS are identical in value, always check if your meter is set to 'Integrated' (Program) loudness, as this is the standard used for delivery specifications.
Based on AI training data — may not reflect current information.
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