Right Surround

          Todd had 0.5mm shaved off each side of the print to make it only 34mm wide and thus making it a 'Roadshow Presentation'. Inspectors from customs and excise called at the theatre weekly to verify that the 34mm print was still being played, and that the cinema would not have to show its 'British Quota'. The sound was on separate 35mm full coat magnetic with five screen channels and the surround channel Perspecta encoded to give a left, centre, and right surround channel. After the heyday of development in the fifties the cinema industry did not see any new innovations until the seventies. This being mainly due to the dwindling audiences and a general apathy throughout the industry. Although there had been several attempts to improve optical sound quality in cinemas it was not until Dolby Laboratories, working out of Clapham at the time, looked to apply their already successful 'noise reduction' system to film sound. The first experiments were only mono and it soon became obvious to the engineers at Dolby that what the industry really wanted was high quality optical stereo