A wireless headphone device may include a receiver for receiving a
wireless digital signal containing a plurality of digital audio streams
combined with control codes according to a predetermined format, a
manually operated selector switch for selecting one or more of the
plurality of digital audio streams to be produced as audio for the user,
and a decoder for extracting the selected audio streams from the received
signal in accordance with the predetermined format and for responding to
the control codes in the received signal to perform predetermined
functions. A wireless headphone system may include a receiver, responsive
to a transmitted digital bitstream in which a plurality of audio input
channels are combined with control data, for decoding and demultiplexing
the digital bitstream, a manual selector switch for selecting one or more
of the audio input channels to be decoded and demultiplexed by the
receiver from the transmitted encoded digital bitstream; and a sound
producing device for selectively reproducing the one or more selected
audio channels in accordance with the control data.