Abstract: A musical instrument comprising buttons for playing notes is disclosed, wherein the buttons are arranged in an isomorphic layout consisting of rows and columns, characterized by means for choosing between a diatonic and a chromatic layout of the buttons and by means for choosing between different keys and scales. The buttons can be velocity and/or pressure sensitive, they can be backlit in different colors and they can have a dynamic note information thereon. When the layout is diatonic, the scales are arranged horizontally in rows, the rows being vertically spaced in relative fourths: when the layout is chromatic, the buttons corresponding to the scale notes of the selected key are lit in way different from the other keys.

Abstract: A musical instrument comprising buttons for playing notes is disclosed, wherein the buttons are arranged in an isomorphic layout consisting of rows and columns, characterized by means for choosing between a diatonic and a chromatic layout of the buttons and by means for choosing between different keys and scales. The buttons can be velocity and/or pressure sensitive, they can be backlit in different colors and they can have a dynamic note information thereon. When the layout is diatonic, the scales are arranged horizontally in rows, the rows being vertically spaced in relative fourths: when the layout is chromatic, the buttons corresponding to the scale notes of the selected key are lit in way different from the other keys.