| 摘要 |
PROBLEM TO BE SOLVED: To easily realize roll performance changing in sound generation intervals. SOLUTION: A user is required to specify a start timing TS and an end timing TE of a roll performance section R, a step time FST corresponding to a sound generation interval directly after starting rolling (for instance 48), and a step time LST corresponding to a sound generation period immediately before ending rolling (for instance 12). In a roll data generation processing, the start timing TS is adopted as the sound generation timing at the time of starting rolling, and 'TS+FST' is adopted as the following sound generation timing t1, and 'FST-predetermined value (for instance 12)' is adopted as the following step time. Similarly, sound generation timings t2-t5 are determined. The sound generation timing t5 immediately before TE is determined so that a time interval up to TE coincides with LST. Roll data for automatic performance are created or roll sound generation is performed according to the sound generation timings TS, t1-t5 determined in such a manner. |
