It might be a terrific new feature for the BK-9 to allow Key Audio loops to be Linked to Variations. So, when you change Variations, the appropriate loop also starts.
While the capability to do Fills with audio has not yet been added (you've got to be able to start the loop in the MIDDLE of the loop, on the beat you call it up on), using full audio drums for the Variations is as simple as adding a Link from 4 of the loops to the 4 Variations.
This seems so easy to do, and would start to put the BK-9 seriously into Ketron Audya territory (but far easier to add your own audio loops to styles than the Audya makes it), or the Tyros5 audio drums feature (with the huge benefit of not being ROM only).
BTW, I still think that marketing the BK-9 without any
Factory loops, and no demo Performances that show off their potential is missing the strength of this feature. It is the ONE thing that puts it head and shoulders above the competition, and the average shopper trying one out in a store is missing the opportunity to see what a game-changer this is. In fact, they are unable to hear it at all. There's a little online, most of which weren't done by Roland, but your average buyer is probably blissfully unaware of the feature.
Sometimes, I wonder if Marketing has a clue what they are trying to sell. Do they even KNOW about this feature?