Variables: Changing note - if it is 1, then the notes must be different within beats Tempo - number of quarter notes per minute Melody instrument - the instrument which the melody is played with. Chord instrument - the instrument which the cords are played with. Long - if it is 1, the music is four times as long as it isn’t. Tone shift - the last tone's number. You can use [Space] instead of Play button. The musical notation writer writes the melody always in C major. It ignores the tone shift.