Hello hptschupp,
Basically, yes. In more detail:
You can route the upper and lower portions of any given rank separately to any mixer bus group you like. A mixer bus group can contain up to 1024 mixer buses (up to 1024 mono speakers, or stereo speaker pairs), and the group's selected allocation algorithm will route the individual pipes that are routed to the group amongst the speakers in the group according to their MIDI note numbers (e.g. cyclically, according to MIDI note number).
Hence, for example, you could do any or all of the following:
- Route different ranks to different speaker pairs, or to different groups of pairs.
- Route different divisions to different speaker pairs (by multi-selecting their ranks when routing them), or to different groups of pairs.
- Route the upper and lower portions of any ranks separately to different speaker pairs, or to different groups of pairs.