| 摘要 |
PROBLEM TO BE SOLVED: To effectively adjust volume by combining a digital processing and an analog processing. SOLUTION: The volume is adjusted in fine steps in a DSP 12 and the volume is adjusted in wide steps in electronic volume circuits 18L and 18R. Then, for the range of prescribed or smaller volume, only adjustment by the DSP 12 is performed. For the prescribed or larger volume, fine adjustment by the DSP 12 is combined in the transition period of the volume adjustment, a fluctuation width is reduced and the volume adjustment is gradually performed. |
