Patent ID: 8571236

Claim:
An amplifying apparatus in a volume control system, the volume control system including the amplifying apparatus and a controller connectable to the amplifying apparatus, the controller having a display section for displaying a controller-side volume value on a display device, a second receiving section for receiving a controller-side volume value from the amplifying apparatus, a changing section for changing the controller-side volume value to be displayed on the display device by the display section into the controller-side volume value received by the second receiving section, a second input section into which an instruction for changing the controller-side volume value to be displayed on the display device by the display section is input by a user's operation, and a second transmitting section for, when the instruction for changing the controller-side volume value to be displayed on the display device by the display section is input by the user's operation, transmitting the changed controller-side volume value to the amplifying apparatus, the amplifying apparatus comprising: a first receiving section for receiving a controller-side volume value from the controller; a first converting section for converting the controller-side volume value received by the first receiving section into an amplifier-side volume value; a first input section into which an instruction for changing the amplifier side-volume value is input by a user's operation; a second converting section for, when the instruction for changing the amplifier-side volume value is input by the user's operation, converting the changed amplifier-side volume value into the controller-side volume value; a first transmitting section for transmitting the controller-side volume value converted by the second converting section to the controller; and a volume control section for, when the first receiving section receives the controller-side volume value or the changed amplifier-side volume value is input into the first input section, controlling a volume of the amplifying apparatus based on the amplifier-side volume value, wherein the first converting section converts the controller-side volume value into an amplifier-side volume value based on a controller-side maximum volume value, a controller-side minimum volume value, an amplifier-side maximum volume value as a maximum value of an amplifier-side volume value controllable by the first input section, and an amplifier-side minimum volume value as a minimum value of an amplifier-side volume value controllable by the first input section, the second converting section converts the amplifier-side volume value into the controller-side volume value based on the controller-side maximum volume value, the controller-side minimum volume value, the amplifier-side maximum volume value, and the amplifier-side minimum volume value.