| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to implement change in sound volume which does not make a user feel discomfort, even when heavy processing load is applied to means for determining sound volume.SOLUTION: A sound volume control unit 23 performs processing of determining new sound volume of an audio signal on the basis of an alternative pulse interval based on count time and the number of pulses counted by a count unit 21 in the count time and present sound volume stored in a storage unit 22 and storing the determined new sound volume in the storage unit 22 as the present sound volume, the same number of times as the number of pulses counted by the count unit 21 and every count time; and outputs information finally stored in the storage unit 22 as the present sound volume, to an electronic volume 5. |
