The invention provides for an audio system 10 comprising an audio signal generating means (12) for output of an audio signal (24), and a remote control device (14) for control of the audio signal generating means (12), the audio signal generating means (12) including means for including an identification signal within the audio output (12) and which serve to identify the audio signal generating means (12) from which the audio signal is output, the remote control device being arranged to receive the identification signal so as to identify the source (12) from which a particular audio signal (24) is output.