| 摘要 |
<p>In order to define current states of a mixer, a set of first-type data (scene data) that define processing to be performed on a signal second-type data and a set of second-type data (snapshot data) comprising a group of parameters that define functions or displaying styles of operators or displays are stored in a current area (14a). Storage area (12c) or memory is provided for preserving the second-type data, so that the second-type data can be written from the current area into the storage area or recalled from the storage area into the current area in accordance with a user instruction.
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