Multiple selection with Brush tool not possible

christiank45481082  wrote With my Adobe Adition CS6 Version 5.02 Build 7 it is not possible to mark multiple frequency regions with the brush tool. Normally "Shift and left mouse klick" should work. What is wrong with my understanding?

I don't think you can select multiple frequency regions; you have to select and work on one at a time.  (I've just checked this in CS6 and can find no way to select more than one region at a time.

christiank45481082  wrote This is the german Version but the noise reduction frequency under the favorites menue is still 60 Hz. The german frequency is 50 Hz. Is there any option I have to correct? Thanks for any help.

Why not simply create/record a new favorite to operate at 50Hz?