| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a waveform generator for generating a musical sound waveform exceeding the upper limit of a reproduction pitch decided by a control of a waveform address stepping value. <P>SOLUTION: A pitch control flag F is provided in each of channel areas CH 0-CH 63 of a RAM 10 corresponding to sounding channels CH 0-CH 63. When there is the sounding channel having the pitch control flag F representing the excess of the upper limit of the reproduction pitch, a leading channel slot and a following channel slot assigned to the sounding channel are regarded as one channel slot. In the leading channel slot, the first output waveform is generated by a difference waveform reproduction based on a maximum address stepping value, and the first output waveform is added to the second output waveform obtained by the difference waveform reproduction based on the remaining address stepping value after subtracting the maximum address stepping value so as to generate the musical sound waveform, in the following channel slot. As a result, the musical sound waveform exceeding the upper limit of the reproduction pitch can be generated. <P>COPYRIGHT: (C)2008,JPO&INPIT |
