Quadraphonic sound, or 4.0 surround sound, utilizes four audio channels connected to four speakers positioned at the corners of a listening space. The multi-tracked audio is mixed dimensional, immersing the listener in an expansive soundscape. Gil Evans, renowned jazz composer and arranger, released his live orchestral jazz album Svengali in 1973, featuring a star-studded lineup of jazz musicians, including Ted Dunbar, Howard Johnson, David Sanborn, Hannibal Marvin Peterson, and more