computer programs used for creating, modifying, playing and recording sounds, sound effects, music and speech; computer programs used for creating, modifying and playing visual effects; computer programs used for creating computer games; computer programs used for creating virtual reality games; computer programs used for creating computer-based learning and training packages; computer programs used for creating stress reduction packages; computer programs used for augmenting other software packages or authoring tools with sound, music or images; and computer programs used for creating, modifying and controlling environmental moods or ambiences; sound signal reproducing apparatus, namely circuit boards and processors with on-board synthesizers or digital/analogue signal processing chips; dedicated hand-held, portable, stand-alone or networked computers containing circuit boards with on-board synthesizers or digital/analogue signal processing chips; loud speakers stereo receivers and amplifiers; public address systems comprising a microphone, an amplifier, and a speaker; public broadcast systems comprising a microphone, an amplifier, and a transmitter; sound recording apparatus, namely magnetic and optical recorders; pre-recorded optical and magnetic data media, namely compact disk read-only memory, audio compact disks, floppy disks, DAT recording magnetic tape, audio cassette tapes, optical disks, video compact disks, erasable programmable read-only memory, hard disks, PCMCIA (personal computer memory card international association) cards, cartridges, flash cards, random access memory, all containing recordings of music, singing, spoken stories, spoken words, synthesized voices, random speech for sound effects, visual images, synthesized sounds and/or natural sounds; pre-recorded audio-video compact discs all containing recordings of music, speech, visual images, synthesized sounds and/or natural sounds; video signal reproducing apparatus, namely video-disk readers and video-card readers; environment-responsive electrical apparatus, namely temperature sensors, sound sensors, humidity sensors, pressure sehsors, visible-light sensors, infra-red sensors, PH-value sensors, galvanic skin sensors, brain-wave sensors, proximity sensors, fluid sensors, voltage sensors, current sensors, photoelectric sensors; and electrical apparatus for environment conditioning, namely PH adjusters; pressure regulators; voltage regulators; current regulators; and photoelectric regulators