| 摘要 |
PROBLEM TO BE SOLVED: To provide technology reducing a level fluctuation of an output sound signal in sound signal pitch changing technology.SOLUTION: A digital signal processor (DSP) 19 of the sound processing device outputs two systems of output signals from a waveform memory 18 by performing cross fading by turns. A correlation measurement section 23 calculates auto correlation value of an input sound data. A periodicity determination section 24 compares the calculated auto correlation value with a predetermined threshold, and determines whether the sound data has periodicity according to difference of both. A control section 22 controls a cross fade gain calculation section 26 so that a cross fade mode is changed according to the determination result of the periodicity determination section 24. |
