| 摘要 |
PROBLEM TO BE SOLVED: To prevent unnatural fluctuation of the output signal level by delaying the correction of the output side signal level to be interlocked with the correction of the input side signal level by the delay time in an operating means. SOLUTION: A central control circuit part 12 detects the delay time of a digital audio signal to be changed according to an effect to be added by a digital signal processor 15. In addition, the time required for each conversion of an analog-digital conversion circuit 14 and a digital-analog conversion circuit 16 is added to the delay time, and the delay time until the audio signal inputted in an operation circuit part 13 is outputted is calculated. The central control circuit part 12 outputs the input level control signal SC3 so as to change the correction level immediately in response to the control command DC for an input level control part 11, while the output level control signal SC4 is outputted so as to change the correction level by making a delay corresponding to the delay time for an output level control part 17. |
