Apparatus for use in processing audio electronic signals to decode a limited number of audio tracks into multi-track audio, or surround sound audio, information; surround sound decoders; multi-channel sound processors; integrated circuits; video monitors; video tuners; stereo receivers and amplifiers; tape decks; car stereos; televisions; portable stereos; boomboxes; audio processors for use in cinemas; video disc playback and/or recording apparatus; audio playback and/or recording apparatus;...