Dolby Surround
On June 18, 2010, Dolby introduced Dolby Surround 7.1, and set up theaters worldwide with 7.1 surround speaker setups to deliver theatrical 7.1 surround sound. The first film to be released with this format was Pixar's "Toy Story 3" which was later followed by 50 releases using the format. About eighty percent of films released are mixed in Dolby Surround 7.1 by default.