A home entertainment system or home theater includes an audio/visual program source with a stereo or surround sound system. An apparatus and method according to the present invention adds supplemental audio content to live or pre-recorded events, such as football games, baseball games, and other sporting events in a spontaneous dynamic environment promoting group participation and enthusiasm. Random access to the supplemental audio content instantaneously and by remote control affords a user of the apparatus an opportunity to creatively add to the viewing experience at home. Additional treatment of the supplemental audio content is effected so that home viewers of the event perceive a seamless audio content including the supplemental audio. Audio effects, such as a simulation of the reverberation of a stadium or large hall, can also be added to further increase the sensation of attending a live sporting event.