Thanks for this. But it doesn’t explain why the Nuendo Master Meter RMS levels, RME Digicheck and others don’t always match. Clearly there is a discrepancy on RMS calculation between meters. I’m not talking about +3 or EBU levels, just pure music RMS levels.
RMS Max means just that. The RMS max value on the master meter displays the maximum RMS level and NOT a historic cumulative RMS level. Other meters may show a historic cumulative RMS value, hence the differences.
Perhaps they use a different time window to calculate the value but I suspect they’re not showing RMS max. Twelve twelve isn’t seeing the same result as you for the BX meter. And as far as I know the BX meter is a cumulative reading and NOT RMS max. In my opinion, there is no issue with the Nuendo master meter.