Yamaha Corporation

Masahiro Mazuka

Taku Nishikori

A data processing unit includes a processing circuit that is configured to process data based on a value of a first parameter, a first operator that is selectively set to one of a first state and a second state that are physically identified, a second operator that is set to a physical state indicating the value of the first parameter, and a processor that is configured to set the value of the first parameter indicated by the physical state of the second operator in the processing circuit in a case where the first operator is in the first state at a time of activating the data processing unit, and set a value of the first parameter supplied from the information processing device in the processing circuit in a case where the first operator is in the second state at the time of activating the data processing unit.

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Hamamatsu, Japan

Masahiro Mazuka