The Trial Versions of the Rieger from Szombathely organ has a limited compass of C2-C3 (048-c to 060-c) in the pedal, C2-G5 (048-c to 079-g) in the manuals. All other functions work.
Free download the Hauptwerk demo sample sets:
Download from Google-drive!!
(Install the part01 and then the part02 and part03 of surround version. It is important to sort.)
Rieger Organ from Szombathely
I suggest you buy only after trying the demo.
Surround vs Stereo mode
If you do not have a surround sound system, but there is enough memory (RAM), I suggest you also install the surround version. If you activate the front and rear stops too, then you will get a more compact and fuller sound than the simple stereo.
upgrade wet to surround