Interruption control apparatus for use in performance information processing system

Claim 1

In a performance information processing system having a tempo setting means for pre-setting a tempo from a plurality of tempo ranges, for playing a piece of music and a performance information processor for processing performance information of the piece of music and controlling an electronic musical instrument connected thereto to perform the piece of music, and an interruption control apparatus for controlling interruptions of the performance information processor, the interruption control apparatus comprising: a first time control means for regulating the length of a time interval between successive interruptions of the performance information processor according to the pre-set tempo so that said regulated time interval is limited within a predetermined constant range, and for outputting an interruption signal at said regulated time interval; a second time control means for receiving said interruption signal and increasing a parameter stored therein by an increment with every reception of said interruption signal, said increment varying with respect to the pre-set tempo, and further for transferring performance information to the performance information processor each time said parameter reaches a predetermined value and thereafter resetting said parameter to zero; and an interruption processing means for receiving said interruption signal and interrupting the performance information processor in response to said received interruption signal.