I don't have Dolby digital surround sound system in my house but my cousin do have a 7.1 home theater system which he is using on his 3d bluray player to watch Hollywood movies. But yes dd sound is a great for watching Hollywood actions movies like captain american , transformers etc but I don't find dd sound any useful for watching Bollywood movies has they don't provide even 5.1 sound movies only few latest released Bollywood movies have some descent 5.1 sound and for sports even 2.1 sound is even for hearing commentary of cricket and English matches :-/