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This paper proposes a game system that presents a cooperative musical performance system using guitar and bass guitar. Because the bass guitar does not necessarily support fast playing, it is suited to the subject of this study. However, it is necessary to accelerate the speed of a pitch-detection algorithm in order to extend it to a cooperative musical performance system that includes other non-string instruments. A constant time interval should be maintained due to the fact that it is difficult to apply a pitch-detection process for specific tones when the recognition time is reduced.
This study considers how new musical possibilities can be achieved through online networks by overcoming the stereotypes in off-line musical activities, such as music-instrument lessons or traditional cooperative performances. It is based on the assumption that the future computer game industry will not be developed as a simple virtual reality but an actual systems like the cooperative musical performance system proposed in this paper.