Hello Pierre I play on Tyros 5 and I drive an MT60, I have the same problem as you because in your genos you have the MT50. I don't have the manual, that would make me very happy. With you I think it's the dynamics because it's set in the bass and the right hand .... My driver does not transpose ... If you do not find it, tell me I will look at the notes they must push. see you soon. lesorgues