Because the roli is not a keyboard at all, its a controller that offers much more then a keyboard does, it kinda feels like an organic mold on the touch. Where a normal keyboard measures touch velocity and aftertouch and some release velocity. The Roli also measures X axis and Y axis movement. Its much more suited for playing all kind of natural acoustic instruments then the traditional keyboard..

And it is the Genos sax sounds you hear.. just controlled by this exceptional comtroller.