Patent ID: 7818482

Claim:
An amplifier, which can be connected to a plurality of content reproducing devices, the amplifier comprising: a plurality of command receiving sections, connectable to a respective remote controller receiver installed in a respective room, for receiving controlled object identified commands for selecting a content reproducing device that is a controlled object, and play commands for causing the selected content reproducing device to play an audio data; a plurality of audio receiving sections for receiving an audio data from the respective content reproducing devices; a plurality of audio output sections for outputting the audio data received from the respective content reproducing devices to a respective speaker installed in a respective room; a storing section for storing identified information of content reproducing devices connected to the amplifier while associating identified information of the command receiving sections and identified information of said audio output sections; a first registering section for registering identified information of content reproducing devices connected to the amplifier to the storing section; a second registering section for registering identified information of the content reproducing device selected based on the controlled object identified command among identified information of content reproducing devices registered in the storing section, to the storing section, while associating identified information of the command receiving section that has received the controlled object identified command and associating identified information of the audio output section associated with the command receiving section; an identification section for identifying the content reproducing device and the audio output section associated with the command receiving section that has received the play command, based on the storing section; a command transmitting section for transmitting the play command to the identified content reproducing device; and an audio transmitting section for transmitting the audio data received from the respective identified content reproducing device from the respecitve identified audio output section to the respective speaker.