sound system in concert

acoustics arena audience audio box business buttons celebration center chair cinema classic comfortable concert conference congress console control crossover desk detail electronics empty engineer entertainment equipment event events famous festivity fisheye hall indoor inside interior led lights line live logbooks meeting microphone monitors movie music musician nobody party performance plaza projection regulation repetitive rock roll row seat seating seats seminars show sitting sliders songs sound sounding stage star switches symmetry system table technician technique technology theater tour volume wires