Jeff - I'll provide some details here to answer your question and/or in subsequent messages. Loptec is right of course that you can just use one Midi track if you like. I prefer the control and flexibility of a separate Midi track for each piece of the drum kit/performance. The Roland TD-12 allows for selecting the midi output per pad or cymbal or rim etc. To set it we just hit the drum stick on the target(a drum pad, a rim, a cymbal, or a cymbal edge) and then set the midi output for that particular spot on the display from the Roland unit. In our case, we don't actually use the Roland TD-12 sounds at all, we just use the drum set as an input device and it does that extremely well. We have one Midi Out cable coming from the Roland TD-12, that's it. The Midi Out cable goes into our Midi In port for our studio. In our case, we happen to use multiple external Midi sound modules so I have a Motu Express 8x8 Midi interface when I'm using the DM Pro. When I'm just recording straight to Session Drummer 3, I can use that same port, or if I'm mobile and detached from the studio, I can just use a single Midi input port on my Scarlett audio interface. In Karl's Sonar X2 video he covers one of the less explained spots within Sonar, the Define Instruments section. His explanation is good to understand that. I've Defined the Alesis DM Pro as an external sound module, so I'm able to point to which DM Pro patch I want to use directly from within each drum track. Of course since its an external sound module (the Alesis DM Pro) it also has audio outs which output the sound from the selected patch, and those audio signals route into the audio interface as inputs. I happen to use a couple other sound sources in addition to the DM Pro. I like the ride sound from another device, and the snare rim shot (stick) from another one. By using the Midi track by track break out method I'm able to use multiple external devices either live or on playback to get the overall drum kit sound I'm looking for. When using Session Drummer 3 I can do that all within the one VST itself. Once I have the Midi tracks recorded and or edited to our liking, then I can record the audio onto audio tracks. Once again, I prefer to have a separate audio track each for snare, kick, toms, crashes, ride, hi-hat, etc. It's a breeze to edit drums in Midi if the different drum kit pieces are on separate tracks. From Session Drummer 3 it's easy to freeze the synth and get each of the audio tracks broken out to their own track. For external sound modules, like when we use the DM Pro and others, we solo each Midi track component and one by one record those to their designated audio tracks. Sounds bad, but that's how it is with external sound modules. If you want the sound as an audio track, you have to record it as an audio track. Works fine for us and we like the sound flexibility.