apparatus for use in processing audio electronic signals to create an expanded audio image from play back of the audio signals through speakers; stereo receivers and damplifiers; tape decks; car stereos; televisions; portable stereos; boomboxes; stereo processors for use in cinemas; video disc playback and/or recording apparatus; audio disc playback and/or recording apparatus; home audio-visual recording apparatus; laser disc players and drecorders; VCRs; digital video tape players; speakers; speaker systems containing a sound transducer and an integral amplifier; CD (compact disc) playback and/or recording devices; mini-disc playback and/or recording devices; motion picture projectors; computer software for expanding an audio image generated by speakers for use in the entertainment field; computers; computer sound processing cards; industry standard computer interface cards; computer interface cards; computer audio processing circuitry; computer hardware, namely computer diskettes, computer floppy disks, hard discs, magnetic tape, CD-ROM discs, mini-discs, optical storage discs, and computer solid-state cartridges, and CD ROM playback and/or recording devices; audio and/or audio-visual recordings stored on magnetic tape or opptical media; audio and/or audio-visual prerecorded media containing entertainment material, namely motion picture film, VCR cassette tapes, laser discs, video discs, optical discs, analog or digital audio cassette tapes, and analog or digital video cassette tapes