| 摘要 |
PROBLEM TO BE SOLVED: To generate clear sound waveforms having no noise by eliminating the noise in a leading portion of the sound data that are sampling recorded and also eliminating a discontinuous point after the removal of noise. SOLUTION: Sound data SD sampling recorded in a first waveform RAM5 are cleared from a leading point to a clear point CP, data '0, 0, etc., 0' are written (steps 11 to 15) and noise in the leading portion is eliminated. After the point CP, envelope data EN in which values that started from '0', gradually become larger, reach '1' and end are multiplied, synthesized and corrected (steps 21 to 28), the discontinuity point of the point CP is eliminated, clear sound waveforms having no noise are generated and data '0, 0, etc., 0' are added to the leading point (steps 32 to 34). |
