SOUND VOLUME CONTROL SYSTEM, AMPLIFIER, AND CONTROLLER

摘要

PROBLEM TO BE SOLVED: To simultaneously control the sound volumes of a plurality of AV amplifiers to the same value.

SOLUTION: Each AV amplifier transmits a current sound volume value to a controller. The controller selects one sound volume value from received sound volume values and changes a position of a slide bar. The controller transmits a sound volume value V of the selected AV amplifiers 11 to all the AV amplifiers which are connected to the controller and have sound volume values not selected. The AV amplifiers, upon reception of sound volume values from the controller, changes the sound volume values of the AV amplifiers.

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