Thank you Tumppi and Mattias for the input but it seems that there is a problem here. I usually use Nugen LMCorrect 2 to correct the loudness of my audios and always with success. I tried to use the loudness normalization with Nuendo …first with the same target as LKFS (-27) and than analyzed it with Nugen but there was a difference of 0,07 between LKFS and Nuendos LUFS. In other words: exported with -27 LUFS with Nuendo and Nugen analyzed it at -26,3. Then I exported the audios again using 27,7 in Nuendo and Nugen showed me -27 LKFS. But it doesn´t stop there. I tried to do that to another audio (Nuendo 27,7 LUFS) but it gave me another result…26,6 LKFS. In other words…I think its not reliable. I may be misunderstanding something.