The XCPU09, the latest-generation CPU board for NEXUS, incorporates loudness metering in the master-monitoring path. The NEXUS loudness-metering function complies with the ITU-R BS.1770-3, ITU-R BS.1770-2, ITU-R BS.1771, EBU R128, and ATSC A/85 standards. The results of the selected metering pass can be used directly as Meta data in a Dolby E®-encoder stream. Various configuration dialogues provide numerous settings. Loudness is measured using a new unit, LUFS, which stands for loudness units full-scale. The EBU R128 loudness reference is - 23 LUFS absolute or 0 LU relative. Start, stop and pausing of the long-term measurements can also be controlled by NEXUS logic control functions.