Apparatus for recording, transmission and reproduction of sound or images; microphones; loudspeakers; woofers; sub-woofers; public address systems comprising amplifiers and speakers; portable music players; audio memory players; mobile audio players; recorders and players of optical discs; audio amplifiers; amplifiers for musical instruments; audio mixers; audio signal processors; electronic sound effectors; effectors for musical instruments; remote controllers for audio/video apparatus; wireless audio servers and receivers; wireless audio signal transmitters; computer software for generating, reproducing, effecting, and recording sound; computer software for controlling audio apparatus; computer software featuring acoustic simulation for designing sound space.;