| 摘要 |
PURPOSE:To prevent the generation of a different sound in a reproducing sound at the time when coefficient data to be multiplied is changed by changing the coefficient data at the time when an analog signal level shown by digital signal data of a result of multiplication is equal to a reference level. CONSTITUTION:An audio signal supplied to an A/D converter 1 is converted to a digital audio signal data group and supplied to a data memory 17, and a coefficient data group read out of a RAM 7 is supplied to a buffer memory 6 and held. On the other hand, by a sequence controller 10, each storage data is supplied in order to a multiplier 5, and an adder 8 accumulates a calculation output of the multiplier 5. In this case, at the time of changing coefficient data multiplied to input digital signal data, when an analog signal level shown by digital signal data of a result of its multiplication is equal to a reference level, that is, when no reproducing sound is generated, the coefficient data is changed. In such a way, the generation of a different sound in the reproducing sound caused by a change of the coefficient data can be prevented. |
