Multi-room wireless audio servers comprising CD-R/RW drives, hard disc drives, and MP3 encoders/players; wireless audio receivers comprising amplifiers, MP3 players, and speakers-- audio/video amplifiers; recorders/players of optical discs; compact disc players/recorders; hard disc recorders; remote controllers for audio/video apparatus; MP3 encoders; MP3 players; CD-R/RW drives; hard disk drives