Hi all,

my working combination right now is a Madi PCIe card in a mac pro joined to a ADI 8QSM via coaxial. For Adat I use an additional HDSPe Raydat.
Now, I think about exchanging the HDSPe Raydat card with an ADI 648. That way I gain 2 PCIe slots back and would theoretically have 7 Adat ports available at 48 k.

My questions an concerns regarding this configuration:
- will it work? the ADI 648 covers all the 64 channels of Madi. Is it still possible to route 8 Channels to the ADI 8 QSM and use the remaining ones for Adat? Or would I need 2 Madi-Cards on the Mac pro for that purpose?
- how would I cable this? I prefer optical madi, because I like to use the Midi via Madi. Would madi ring network work?
- ADI 648 is up to 96kHz maximum sampling frequency ... can I still run the Madi PCI-card on 192 kHz with both units connected (not using the I/Os of the ADI 648) or would I need to recable for that purpose?
- I am watching a used unit on sale ... what is the difference between MkI and MkII?

Thanks a lot!