A method for the use of the white keys of a musical keyboard such as a MIDI keyboard for the playing a selected scale whereby all while keys of the keyboard are remapped to the selected scale such that adjacent keys of the keyboard can be used to play adjacent notes of the selected scale. There is also disclosed a method for providing a functional aspect to at least one black key of a musical keyboard such as a MIDI keyboard, wherein upon a key of the keyboard being pressed, a first check is conducted to determine if a user has activated the selected scale setting; and if the selected scale function has been activated, a second check is conducted to determine if the key is a black key or a white key. If the key is a black key a second lookup table is checked based on a MIDI message for the black key to determine a corresponding functional aspect corresponding to the black key.