Patent ID: 8879753

Claim:
A mixer comprising: a plurality of input ports that inputs audio signals from external devices related to audio signal processing; a connection section that connects, to said mixer via a communication network, said external devices that supply said audio signals to the plurality of input ports; a designation section that, for a particular one of the external devices for which communication with said mixer via the communication network is to be established, designates, in response to entry operation by a user, ID information identifying the particular external device; a logical connection establishment section that establishes logical connection such that data communication is performed between said mixer and the particular external device corresponding to the ID information designated via said designation section; a memory that stores ID-port association data indicative of an association between the ID information and a first input port of the plurality of input ports, wherein the first input port inputs a first audio signal of said audio signals, wherein the first audio signal is from the particular external device identified by the ID information; and a display control section that receives data indicative of a state of the particular external device, for which the logical connection has been established, from the particular external device via the communication network and said connection section and causes a display device to display the state of the particular external device on the basis of said received data indicative of a state of the particular external device.