Method of processing performance data

Abstract

When a player plays a musical piece on a keyboard of a musical instrument, the instrument provides an event datum at every event of the key depression and key release. The event datum includes information on the time of such depression or release and information on the note pitch. Thus a sequential train of these event data constitutes performance data which represents the progression of the music actually played. According to a reference tempo clock, a barline datum indicative of the time for a barline is provided at every period of a time length which defines a measure. Where the performance data exhibits the existence of a note pitch at the time of the barline and then if the time difference between the barline timing and the immediately preceding event is shorter than a predetermined time length, the performance data is adjusted so that this preceding event should fall on the barline timing, but if not shorter and then if the time difference between the barline timing and the immediately succeeding event is shorter than a predetermined time length, the performance data is adjusted so that this succeeding event should fall on the barline timing. Where the performance data exhibits the non existence of a note pitch at the time of the barline and if the time difference between the barline timing and the immediately succeeding event is shorter than a predetermined time length, the performance data is adjusted so that this succeeding event should fall on the barline timing. Thus, there is obtained adjusted performance data free from unintended and unnecessarily precise locations of barlines with respect to notes and rests.