Keyboard not recognized/sounding

[Zlartibartfast]

since the last JK update, I have been able to add a MIDI track to my audio profile, then assign MTron Pro (a virtual Mellotron) to that track. (JK calls is a VST instrument, when in fact it is an Audio Units instrument, but no matter).

So in this regard you CAN play MIDI in JK. By combining the audio output of my Roland synth, and the virtual Mellotron from my MIDI track, I can get a crazy selection of sounds to play.