From the website (
http://www.voxusorgans.com/en/product/haarlem , look under "features"):
Requirements Professional-extended:
Hauptwerk Advanced 4.1
16bit multi loops compressed: 31 Gb RAM (default)
20bit multi loops compressed: 55 Gb RAM
24bit multi loops compressed: 62 Gb RAM
Also from
http://www.voxusorgans.com/sites/defaul ... 20Info.pdf :
Slider
It is possible to adjust the listening location in the church with
the Professional-extended edition. This can be achieved by moving
the slider, which is found in the Control tab. This function works
optimally when you use a stereo headphone or speakers. When you
have a quadraphonic sound system with minimally 4 speakers (2
front and 2 rear) we do not advice to use this feature. When the sli-
der is moved upwards, the organ sounds closer. When the slider is
moved down, you will change the listening position further away
from the organ. According to taste, you can experiment with the
slider’s position’s effect on more direct or indirect sound.
Apparently also the manual compass has been extended to 56 tones, C-g3 (before 54 notes, C-f3)