Sound design for a system in an auditorium requires powerful loudspeakers that can uniformly cover the large venue with clarity and distinction for spoken word. But because these buildings also transform into a concert hall when a there is a muscial event, that same system must be adapt to meet the requirements of reproducing high-quality live sound. Our approach to these applications is to implement K-array loudspeakers with Electronic Beam Steering to digitally adjust the dispersion of a line array element, which not only ensures the same listening experience to all audience members but, at the same time, limits the noise pollution in the areas where the sound pressure must be kept at a minimum. Or if the audiorium is smaller, our PAT line arrays can be employed for a perfect phase response achieved in both the near and far fields. The narrow vertical coverage minimizes the sound spill towards the walls and the floor.