Abstract: When a music performance game starts, the user selects a part to be assigned to himself/herself. When the selection of the assigned part is completed, an ensemble starts. When the ensemble starts, the user can participate in the ensemble by performing an input operation corresponding to the assigned part. During the ensemble, history data representing the user's musical performances in chronological order is generated and stored in an external main memory. When the ensemble ends, the user can play again, changing assigned parts. At this time, as for the part currently selected by the user, the instrument is played based on the user's input, while the history data representing the user's current musical performances in chronological order is generated. Of the other parts, as for the parts that the user has selected earlier, the instruments are played automatically based on the history data.

Abstract: At a time T0, prior read reproduction is started with a volume of 0. Upon starting the prior read reproduction, MIDI events containing note events are sequentially generated. Each time each of the note events is generated, note data is generated based on these note events and sequentially stored in a note pool 123. At a time T1, actual reproduction is started. After the time T1, the actual reproduction and the prior read reproduction are concurrently performed at a same speed. Accordingly, the prior read reproduction precedes invariably two bars ahead of the actual reproduction. Information pertinent to notes contained in apart from a currently played position to a position two bars ahead of the currently played position can be easily obtained from the note pool 123.

Abstract: The game apparatus stores music data which indicates at least a pitch of each of sounds which form a melody of a predetermined piece of music and an output timing to output each of the sounds. The game apparatus sequentially detects, among the sounds included in the music data, a target sound which is a sound an output timing of which comes after start of playing by the music data. In the case where a first input is performed when or after the output timing of the target sound comes, the game apparatus outputs the target sound. On the other hand, in the case where a second or later input is performed after the output timing of the target sound comes, the game apparatus determines a pitch of an ad-lib sound, and outputs the ad-lib sound at the determined pitch.

Abstract: Acceleration data outputted from an acceleration sensor provided in an input device is acquired and a magnitude of an acceleration is calculated. Next, based on the calculated magnitude of the acceleration, at least one piece of track data representing a target music to play is selected from music piece data including a plurality of pieces of track data stored in memory means. Then, based on the selected track data, data for controlling a sound generated from a sound generation device is outputted.

Abstract: Acceleration data outputted from an acceleration sensor provided in an input device is acquired and a magnitude of an acceleration is calculated. Next, based on the calculated magnitude of the acceleration, at least one piece of track data representing a target music to play is selected from music piece data including a plurality of pieces of track data stored in memory means. Then, based on the selected track data, data for controlling a sound generated from a sound generation device is outputted.