we’re doing some loudness measuring and wanted to use Nuendo’s loudness-tools as a reference. However we stumbled upon a difference metering readout when comparing the integrated loudness readouts from the loudness track (using a “Quick Analysis” over the exact time of my region) to the ctrl-rightclick–>audio–>statistics loudness information. (All mono files).
The differences are only in the magnitude of 0,1LU or so - but they don’t appear to be simple rounding errors?! For example one integrated loudness measurement of a file would be -34.8LUFS in the loudness track and the same file’s statistics would say -34,69LUFS.
Can someone explain how/why these differences occur? I know they are only small but a measurement should be a measurement? Does this have to do with integration time/gating?
Loudness Range readouts are off by around 3LUs - but they also skip around after the “Quick Analysis” is finished, so I don’t know if one can trust the Loudness Track in this case?
Any help/information on what parameters are different between the two methods would be much appreciated. In the end I guess both readouts follow EBU R128 & ITU BS1770?!
(Things got really messy, when comparing the Nuendo readouts to the demo of RTW’s Plugins. The measurements were (roughly - again about .1LU deviation) the same when comparing 5.1 loudness - but on the mono track RTW was suddenly 3LU louder? What’s going on there? Any experiences? Could have been a wrong setting - can’t verify at the moment, because trying to open the RTW plugin keeps crashing Nuendo today )