| 摘要 |
PURPOSE:To set the amplitude frequency characteristic of an indirect sound, its level and its incident direction freely by using an input level adjustment device, adjusting the input level optimizingly and setting the delay time digitally according to the ADM system. CONSTITUTION:An input signal given from input terminals 1a, 1b of both L and R channels is outputted to output terminals 11a, 11b via a connection matrix 9 and adders 10a, 10b as a direct sound signal. On the other hand, the level of the input signal from the input terminals 1a, 1b is adjusted by input level adjustment devices 2a, 2b, AD-converted by AD converters 3a, 3b and outputted as plural indirect sound signal having a different delay time and level by a digital circuit section 4. Then the incident direction of the indirect sound signals is set by the connection matrix 9, the direct sound signal and the indirect sound signal and the indirect sound signals themselves are adder by adders 10a-10h according to the connection matrix 9 decided as above. |
