Compact disc players; audio tape, cassette and disc recorders and player; compact disc player with magazine for holding and playing multiple discs for easier access; video disc recorders and players; portable compact disc players; portable audio tape, cassette and disc players; digital audio tape recorders and players; combination disc players which play both video disc and compact or other audio disc; audio cassette players; video disc players capable of storing and automatically loading and playing multiple discs; electronic unit for adjusting the key of music played on a video disc player to the voice of a person singing along with the music; electronic unit for controlling video disc players actuated by insertion of currency, namely, juke boxes; stereo equalizers; stereo and surround sound amplifiers; stereo and surround sound receivers; stereo and high definition television tuners; record turntables; loud speakers; loud speakers for the use in cars and boasts; loud speaker system sold separately or together as a unit comprised of woofers, tweeters, or mid-range speaker cones contained in a cabinet; speakers for personal computers; outdoor and illuminated loud speaker; remote controller for audio disc