I recently upgraded from Wavelab 6 to Wavelab 8. I do freelance editing and mastering work for a major audio book publisher, and since the upgrade there have been problems with the masters I have delivered not meeting their in house spec. I get projects as ProTools sessions and edit in Pro Tools, but I do my mastering work in Wavelab.
Today I did a careful rundown of my entire editing and mastering chain and discovered that the Raw Loudness readings in Wavelab (using the default settings) are consistently 4dBFS hotter than the RMS values measured in Pro Tools (using the Gain Audiosuite plugin).
I had assumed that the “Raw Loudness” measurement was RMS as in previous versions of Wavelab, is that not the case and if not then what exactly is it a measure of? Is there any way to calibrate the raw loudness measurement, or will I have to subtract 4 from my loudness measurements in Wavelab in order for my masters to fall within spec when measured in Pro Tools?