The program is designed to help you master the basic knowledge of music theory needed to play the accordion and learning the game on the right keyboard.Program features: - Training of musical intervals; - Training notes; - Exercise the right to play the keyboard (range, random notes, only the white keys, a certain octave, all keys); - Play music from the midi-files (as included in the program, and added to the library); - Customize the appearance and duration of musical intervals. Before each exercise is a brief reference to the theory.