Changing Reference Tunning for Pitch in Vari Audio

Nuendo
1

HI
I´m working on a project that the Orchestra is tuned at 442 and the singer sometimes is flat but it looks in VariAudio like he is Hi in pitch: I think it is because the reference is 440, where can I change the reference pitch or how can I move to a “not exact” pitch as the VariAudio suggest.

Thanks

D