I don't know about the MIDI thing but, to adress what Jakev says:
I listened to the Gibbon's recording on youtube. Everyone's comments places it way above Hamelin in terms of interpretation, BUT I don't know how that fact that Gibbons misses nearly every other note does not drastically take away from the enjoyment. I think accuracy trumps interp.
I'm curious what recording you're speaking about. All I have is his studio recording of the piece, which to my ears is absolutely brilliant.
Everyone has their own opinion of Hamelin, and whether or not you like him is up to you (you being the collective you).
Personally, I've never been a huge fan of him, because his music just doesn't
speak to me. I'm impressed by his technical prowess, but the majority of recordings I have heard of him have, as I've said elsewhere in this forum, left me cold. Music isn't purely about notes played in the right order at the right time, and I prefer my music a little more expressive than how Hamelin makes it.
His recordings of the Alkan Concerto aren't any exception. His major fault, in my eyes, is that he intensifies the difficulty by rushing the fast notes, as though these fast notes are the point of the piece, when in reality there is so much more going on. His playing of this piece has left me bored rather than thrilled or moved, whereas Gibbons' interpretation always leaves me excited and energized by the time the third movement draws to a close. To me, Gibbons makes sense of the piece and gives it meaning. Listening to Gibbons' Alkan Concerto is like reading a wonderful fantasy or fiction novel, while Hamelin's interpretation feels just like reading a dully-written textbook, which, while well-written, doesn't tell me anything because it just puts me to sleep.
Admittedly, I have not listened to all of Hamelin's recordings, but what I have listened to has left me emotionally unimpressed even while I appreciate his skill and dexterity.
As for the topic, I haven't heard both recordings, so I can't help there.