That's interesting... I know that a while back Sony changed how the
controller assignments were done, and I haven't examined it since. I'm
in the middle of a big overhaul of the firmware and will look into
this issue again.
Part of the new firmware I'm working will let you use the MIDI Rocker
(LX or original) as a general-purpose MIDI-to-USB converter on your
Mac or PC so you can use it with software like Garage Band. I'll be
posting more information about this over the weekend and probably
release a beta version too. Got to do something to keep busy while the
Playstation Network is down :)
-Scott P (Byte Arts)