Just wondering if anybody has any info on what sort of protocols these guys are using for their expansion cards (Yamaha, Behringer, Digico, A&H, etc.). The Yamaha MY cards are particularly interesting to me since they are only 16x16 and have such a large card connector on the back that I almost wonder if it’s not just an analog connection back there… haha anyway, this is just a curiosity more than anything so if anybody has any info they can share it would be greatly appreciated. Thanks!