In response to a request, I have made a quick unboxing video of the M-Audio Oxygen 49 which I am now using with Garage Band on my Mid 2012 15" MBP:
http://www.youtube.com/watch?v=MhUsYzl6_Iw
In response to another question I frequently get: Yes, it does fully power the keyboard via USB power from the laptop with no issues.
http://www.youtube.com/watch?v=MhUsYzl6_Iw
In response to another question I frequently get: Yes, it does fully power the keyboard via USB power from the laptop with no issues.