Loudness is measured over a whole programme, the way people hear it. The standards share a method. They part on the number. EBU R 128, the European broadcast recommendation last revised in November 2023, targets -23.0 LUFS with a tolerance of 0.5 LU either way (1.0 for live programmes) and a true-peak ceiling of -1 dBTP. ATSC A/85, revised for American television on 8 July 2026, targets -24 LKFS with a measurement tolerance of about 2 dB and a ceiling of -2 dBTP. For streaming, the EBU's supplement R 128 s2 suggests an interim -20 to -16 LUFS, and ATSC now suggests a single target between -23 and -27 for streaming services.
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