| 摘要 |
PROBLEM TO BE SOLVED: To easily attain a setup operation with high efficiency by simultaneously perform the level adjustment of every channel concerning the acoustic output of each loudspeaker and the setting of delay time of every channel that is required to secure the coincidence of arrival times of acoustic outputs to a listener among the speakers. SOLUTION: The level adjustment for each channel concerning the acoustic output of every speaker 7 is performed simultaneously with the setting of delay time of every channel, that is required to secure the coincidence of arrival times of acoustic outputs to a listener among the speakers 7. When the level adjustment is performed, a microcomputer 32 compares a detected level with its reference value and calculates the over and under of the acoustic signal levels of channels. Then a level adjuster 4 adjusts the level of every channel. When coincidence is secured among arrival times, the longest of the measured arrival times is defined as the reference arrival time. Thus, a delay time setting device 3 sets the difference between the above reference time and each arrival time at the delay time for each corresponding channel. |
