Provided is an audio device, including: at least one processor; and at least one memory device that stores a plurality of instructions, which when executed by the at least one processor, cause the at least one processor to: play, with a given length of delay, a first-channel audio signal included in an audio signal; obtain one of operation information about operation of the audio device and setting information about playing of the audio signal; and transmit one of the operation information and the setting information, and at least a second-channel audio signal included in the audio signal, to another audio device.