| 摘要 |
Stream audio signals input in channel input terminals (710FL, 710FR) of a large setting are passed through large high-bandpass filters (720) arranged identically to small high-bandpass filters (740) for extracting high-frequency components from stream audio signals input in channel input terminals (710C, 710SL, 710SR, 710SBL, 710SRB) of a small setting. The stream audio signals are also passed through large low-bandpass filters (730) for extracting low-frequency components blocked by the large high-bandpass filters (720). The extracted high-frequency components and the extracted low-frequency components are added together by large adders (780) so as to be output. Phases of the stream audio signals in different settings can be matched, thereby contributing to favorable reproduction.
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