I think the MF designers were out to lunch when MIDI was implemented in this synth. So far as I know and from the manual, aftertouch (pressure) is not recognised. There isn't a MIDI implementation chart in the manual as there is with, so far as I know, every other MIDI device ever made, merely a list of CC numbers which uses non-standard codes. It's trial and error for users and for me is a severe limit on the MF.