Sound 360
Sound 360 was the name of a motion picture sound system used by 20th Century-Fox to enhance the premiere engagements of their 1977 feature Damnation Alley.
The format employed the standard 35mm magnetic stereo soundtracks in a unique configuration. The center channel was directed to the usual behind-the-screen loudspeaker. The left and right channels were redirected to a pair of large full-range speakers mounted on either side of the auditorium. The surround channel was reproduced by a single full-range speaker mounted in the back. The general effect was more enveloping than a standard 35mm stereo presentation, and very similar to the Megasound process unveiled a few years later by Warner Bros. for the film Altered States. In addition to Damnation Alley, the film was also released in the Sound 360 process.
The 2011 DVD and Blu-ray release of Damnation Alley did not feature a "Sound 360" audio option, as the original elements were not salvageable.
