To replay a musical performance type game device with a optimum sound for a player and an audience to allow the player to easily hear a performance sound by differentiating the volume, quality and level of the sound to be output corresponding to the roles of speakers.

A central processing unit 12 reads performance data from a storage unit in accordance with signals input from an input 10 of a player A and an input 11 of a player B and transmits the data to a sound control unit 20 to replay a corresponding sound. Accompaniment data 12 are also transmitted to the sound control unit 20. The sound control unit 20 synthesizes sounds corresponding to the roles of speakers a-d. For example, for a sound output by a monitoring speaker, the volume of a performance sound is increased, the quality is changed for easily hearing the performance sound in a frequency band or the level of the performance sound is changed to allow the player to easily hear his performance sound.