Yamaha DDP-10 Owner's Manual - Page 9

English Dolby Digital (AC-3) + 2 Digital Sound Fields Digital sound fields are created on the independent left and right surround sides of the Dolby Digital (AC-3) decoded sound field respectively. They create a wide acoustic environment and emphasize surround-effect in the room, letting you feel much presence as if you are watching a movie in a popular Dolby Stereo Digital theater. This combination is available on the sound field program " DIGITAL ENHANCED". Dolby Digital (AC-3) + 3 Digital Sound Fields Digital sound fields are created on the presence side and the independent left and right surround sides of the Dolby Digital (AC3) decoded sound field respectively. They create a wide acoustic environment and much surround effect in the room without losing high channel separation. With wide dynamic range of Dolby Digital (AC-3) sound, this sound field combination lets you feel as if you are watching a movie in the newest Dolby Stereo Digital theater. This will be the most ideal home theater sound at the present time. This combination is available on the sound field program "DIGITAL MOVIE THEATER". 5