I would like to lower the tonal register of a split I have assigned to the top octave of the keyboard so that I can play (e.g. piano) on the lower octaves and then a (e.g. synth) hook in the middle of the song without needing to hit any buttons. At the moment, the split I have assigned has the synth sounding really high pitched (obviously, because it is assigned to the top end of the keyboard) but I would like to drop the tonality of this area so that the top octave starts around C4. I would be very grateful if anyone could share with me how to reassign the tonal register of a split.