Hey xdiaba, don't know much about your midi buddy, tried to look it up and it doesnst want to play easily, so I'd piss it off, WTF is it supposed to do... (sorry, you may like your midi buddy.. seems like crap to me... I can't even google it and get a result that's sensible). I'm struggling to understand why you'd need it ?? whatever it's supposed to do, don't mean to offend BTW.
The Mp1 BTW is old/er school, it doesn't respond to real time midi (pedals, switches, etc, just MIDI program change). the G major however, is happy to go with real time midi and you can control it in lots of ways, to me the most useful is you can control the g-major master vol with a midi cct pedal. BTW the MP1 has midi in, midi through and midi out, so Midi through is what what it gets from your pedal (passes through), midi out is wahtever you program in the MP1 midi table