Hi, I'm also trying to connect the Airstep with the FM3.
Too bad about the lack of MIDI-over-USB support, it would solve my problems, can I ask you which Bluetooth adapter are you using?
I have to buy one and I'm undecided between the Yamaha MDBT01 and the CME WIDI Master.
I would prefer the Yamaha, it seems more solid, especially the WIDI I don't like the fact of the connector between the two components, but I can't find any feedback on the Yahama and Airstep combination.