I have connected my XPS 1330 to my LG LCD tv through an HDMI cable.  The video comes through great but there is no sound.  I have seen on many forums to go to the sound playback option and set the Digital Output Device (HDMI) as the default.  Problem is I do not have that option.  Only playback option I have is regular sigma tel audio codec for the speakers.

Weird thing is in the device manager, under the sound card controllers I can see Intel High Definitions Audio HDMI installed with the newest drivers.  This one has got me confused.

Any help would be great.

Thanks