Thanks for that advice. I’ll have a look at that!
I was also confused because, when you insert the “Testgenerator” plugin (which comes with Nuendo) in a master output insert, set to pink noise at -20dB, the output meter shows -20dB Peak and -30dB RMS (?) When changing it to -10dB the RMS value is -20dB. So I guess the plugin dB gain setting is based on peak values and not on RMS. (Apart from the fact that the generated pink noise is probably not as accurate as the Dolby Pink Noise file)