???? I own a macbook pro, m-audio axiom 25 midi usb keyboard, boss dr-880 drum machine, roland spd-s sampling midi pad. ?? Can i use the m-audio keyboard as a midi interface, not only to chain all of these together but to be able to trigger each one individually and pull the audio out of the roland gear as well as trigger software instuments from logic? what would be the advantage of a midi interface if needed or is all possible with the m-audio keyboard?? thanks for any help or suggestions, midi 101 for me!