Currently Channels carryin 5.1 DD surround sound r : Zee Tv HD, Zee Tv SD, &Tv HD, Star Plus HD, Life Ok HD, Star Gold HD, Zee Studio HD, MN+,Star Movies HD, Zee Cafe HD, Star World HD, Star World Premiere HD, Nat Geo HD,Nat Geo Wild HD..
Has Surround Sound & iVC technology options under guide settin option ..
iVC :
Sound volume that adjusts dynamically to the level of background noise
A special audio processin method iVC enables to listen for background noise and adjust the sound level accordingly.
As a result, the volume level automatically matches the ambient noise level by goin up or down, thus maintainin precisely the level that is most comfortable for the ear.