sentences:  Besides the alterations to the rear of the circle for the enlargement of the projection room, the circle was also extended toward the screen to increase audience capacity.The proscenium arch was also moved into the auditorium to increase the backstage area to house the 5 surround sound loudspeakers and the 43feet wide screen.Also housed backstage were the motors to drive the adjustable black cloth screen-masking and the Phillips surround sound main-amplifiers.