To provide a game device capable of increasing the interest of a game in the way of allowing a player to freely select his favorable sound and BGM and changing over an optimum sound and BGM at an optional timing corresponding to surrounding noise conditions and the condition of the audibility of the player.

When a player presses a switch 110 at the midway of a game, an input 111 detects that and indicates that information to a sequencer 112. The sequencer checks waveform data to be changed and reads address data of the waveform data out of a waveform data address table 113b. At the time when the switch 110 is pressed, if WAVEma of (a) class is replayed, the sequencer 112 sets in turn the top address of the waveform data address of waveform data WAVE(m+1)b of (b) class on a PCM sound source 114 at the end of the WAVEma.