Present list of channels is as follows (Last updated 30th October 2011).
SUNTV Direct
Dolby digital 5.1 sound is supported.
Channels: Tamil Movies HD, Telugu Movies HD, Movies Now HD, Discovery HD, National Geographic Channel HD. Doordarshan HD.
Airtel Digital TV
Supports 5.1 via optical
Channels: Colors HD, CNBC TV18 Prime HD, Star World HD, Star Movies HD, Star Plus HD, Star Gold HD, Movies Now HD, Discovery HD, National Geographic Channel HD.
Videocon D2H
Dolby digital not supported.
Channels: Colors HD, Star World HD, Star Movies HD, Star Plus HD, Star Gold HD, Movies Now HD, Discovery HD, National Geographic Channel HD, Travel XP HD, Active HD 3D, ESPNHD, Star Cricket HD.
Tata Sky
Dolby Digital 5.1 surround supported
Channels: Star World HD, Star Movies HD, Star Plus HD, Star Gold HD, Discovery HD, National Geographic Channel HD, Star Cricket HD.
Dish TV
Supports 5.1 via optical
Channels: Ten HD, Neo Sports HD, Movies Now HD, Discovery HD, National Geographic Channel HD, Travel XP HD, History HD, National Geographic, Adventure HD, National Geographic Wild HD, MTunes HD, CNBC Prime HD.
Reliance Digital TV
Dolby digital 5.1 not supported.
Channels: ESPN HD, Star Movies HD, Star Plus HD, Star Cricket HD, Movies Now HD, National Geographic Channel HD, iConcerts HD.
Hi,
Videocon HD d2h supports 5.1 audio through digital audio(coaxial)cable in Star channels -Plus,Movies,World & Gold.
Thanks,
Dijeesh.