Patent ID: 7565214

Claim:
An audio system for playing back recorded information by remote transmission, comprising: a transmitting output unit having an analog/digital converter converting, each of an analog audio signal and an L/R channel discriminating stereo signal, acquired from the recorded information by an audio playback server, into digital signals each having a digital waveform, and a superimposing circuit creating a first superimposed digital signal by performing, selectively, addition or subtraction between the digital signals respectively corresponding to the analog audio signal and the L/R channel discriminating stereo signal; and a receiving input unit, connected by a first cable to the transmitting output unit, having a separating circuit separating the first superimposed digital signal, transmitted over the first cable from the transmitting output unit, into digital signals respectively corresponding to the analog audio signal and the L/R channel discriminating stereo signal, and a digital/analog conversion circuit converting the digital signal corresponding to the analog audio signal into analog form, wherein the receiving input unit outputs an analog audio stereo signal to an audio output device for playback in accordance with the L/R channel discriminating stereo signal.