The news of the upcoming microarranger has piqued my interest again in the arranger category. It seems to be priced right and have the nice small form factor that would be useful in my cramped space.

Anyhow.... I was perusing the manual of the of the other arranger this micro is based upon (dont recall the number) and was quite impressed with how deep you can edit sounds, etc on these things! I guess 2 questions came to mind right off the bat:
1) If you wanted to use the midi out to trigger another sound source (my M3, for example), how does that work since there is a 'sequencer' for the backing tracks and then a traditional sequencer to add other parts over top of the backing? What midi channels transmit from the backing tracks? I may have missed that section in the manual....
2) It also appeared that there are a lot of button presses to record your own 'styles/parts' (which I would mostly be doing). Is it really as complex as it seems? Or is it easier once the unit is in front of you?
Sorry for the length and probably basic questions, but I have never spent much time with an arranger board before.

Take care.