I bought the Steven Slate EX pack from audiomidi. What else do I need to start actually building drum patterns? I thought there would be some sort of sequencer included with it, but either there isn't or i'm not smart enough to get it figured out. I have access to a cheap midi controller, but I would prefer to use my keyboard. I use reaper, so something that would be usable with that would be best. Mac or PC, I have both, but I would prefer to keep everything on my mac.