[soundblaster]

Thanks for your suggestion.
This is the first thing I tried.
PT will see the three 888s under Hardware setup. (even more if I specify more).
In the I/Os I can set it up for 24 I/Os. All the grid is set up for the three modules but when I hit play I can only play back 16 at a time. By setting different order of the 888s in the hardware set-up I can get A and C to play or A and B or even B and C but not all three (A,B,C) at the same time.

Any other suggestion will be greatly appreciated.
Thanks!