I'd like to DITTO Samuel's thought process with a tweak here and there. Sonar created a brilliant open-face drum map about 20 yrs ago and never improved on it. What was great about it was you could take as many VST's and ext. sound sources as you wanted, thus adding conceivably 16 ch's per device or VST; however, to keep it simple I just used 3 ch.s from each device (10,11,12). The beauty of it was you could use a kick from 1 device a snare from another, a rimshot from yet another, etc., etc. This allows you to use ALL of your greatest samples. So, conceivably you could have an entire map of the 80 best snares in your entire arsenal, and transpose them to the correct output note whenever you wanted. The same for every voice on your kit. The worst weakness though, was (if I can remember correctly) that the app had no way of permanently saving every parameter on the map. So, if you switched a device, or VST out for another you lost all the settings, and had to rebuild it. If there's any company that has the open-minded innovativeness to pull off a relatively simple matrix setup like that it seems PreSonus would be the one. Keep up the great work fellas.