To output music other than original music, which is suitable to keep a player excited, in the place of a part of the original music, such as a beginning or ending thereof, which is unsuitable to serve as game music. When main part end timing TE arrives while outputting original music MO1, connection music MI2, correlated with original music MO2, which is next game music, begins playing. Subsequently, when original music reproduction start timing TP arrives while outputting the connection music MI2, reproduction of the original music MO2, correlated with the connection music MI2, begins