Patent ID: 8710347

Claim:
A performance apparatus to be used with a musical-tone generating device for generating musical tones, the performance apparatus comprising: a holding member extending in a longitudinal direction to be held by a player with his or her hand; an acceleration sensor provided in the holding member, for obtaining acceleration-sensor values along three axial directions; and controlling means for giving the musical-tone generating device an instruction of generating a musical tone, wherein the controlling means comprises: sound-generation instructing means for giving the musical-tone generating device an instruction of generating a musical tone at a timing specified based on the acceleration-sensor values obtained by the acceleration sensor; angle calculating means for calculating, based on acceleration-sensor values obtained by the acceleration sensor at a certain timing when a value obtained based on the acceleration-sensor values obtained at the certain timing has increased to larger than a predetermined value, a roll angle of the holding member rotating about an axis in the longitudinal direction of the holding member; and musical-tone composing element deciding means for deciding a musical-tone composing element of a musical tone to be generated, based on the roll angle calculated by the angle calculating means.