Emu XL-7 & MP-7 User's Group

Too bad you don't have the slightest clue as to what sysex is or does
huh? There can't be a one button solution when multiple equipments exist.
  The stuff regarding how you write the code starts on page 36.
However sending known, well documented sysex data to the xl-7 is
problematic....(documentation being a real stumbling block) 
  The midi implementation on the fc-300 only pertains to Roland
equipment and more specifically to the fc-300; useful if you want to
talk to the fc-300 by way of some other device using sysex.