The 50th anniversary edition Blu-ray features the Dolby Atmos mix, 5.1 surround sound mix, as well as remastered stereo mixes. DOLBY ATMOS MIX 5.1 SURROUND MIX - 24bit/96kHz UNCOMPRESSED / dts-HD MA REMASTERED STEREO MIX - 24-bit/192kHz UNCOMPRESSED / dts-HD MA 5.1 Surround and Dolby Atmos mixes by JAMES GUTHRIE