| 摘要 |
The process control unit ( 11 ) of a microcomputer ( 1 ) controls a decoder ( 21 ) to decode an input signal, and acquires the voice format information of an input signal. The process control unit ( 11 ) calls the processing method of matrix processing stored in a storage unit ( 12 ) based on the acquired voice format information. The process control unit ( 11 ) further acquires encode channel-related information from an input signal. When the encode channel is 2-channel, the process control unit ( 11 ) controls a surround processor ( 22 ) to perform matrix processing on an input signal and output a multi-channel-based voice. An acoustic device capable of setting a reproduction mode according to an input signal is realized.
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