A novel Janko-type keyboard with attachable/detachable touch plates is disclosed. The touch plates have a coloring differing from traditional keyboards. A novel music tablature corresponding to the keyboard design is provided. Also a novel piano notation system corresponding to the keyboard design is provided. Finally a method to teach playing Janko-type keyboard is provided, where the method included virtual Janko-keyboard on computer touch screen, optionally an actual electronic Janko-keyboard attached to the computer and computer programs providing music notation on tablature system of this disclosure.