The Golden Compass Audio Questions?

[rlmbluray]

I am using a Sharp Aquos BDHP20U. I am a little confused about these audio tracks on the Blu-ray discs. For example The Golden Compass has two advanced audio tracks:

English: DTS-HD Master Audio 7.1
English: Dolby Digital 5.1 EX

For the Sharp I am using the 5.1 outputs input into a Lexicon MC12 5.1 analog processing through Lexicon's 5.1 Logic 7 codex.

So how to I get the DTS track from the Golden Compass BD into my Lexicon?

If I select on the BD the DTS program what will output from the Sharp's 5.1 analog jacks? How do I confirm what I am playing?

I am confused on how these new audio formats are processed and how they are converted from the BD to the Surround Processor (Lexicon) to the speakers.

If I use the digital coax I assuming I will just get the traditional 5.1 DD program for the disc, and can not get these new audio formats through a compressed bit streamed digital connection.

If I am not getting the new codex's out of the 5.1 jacks on the Sharp, what am I getting? The Golden Compass only shows a choice of two audio programs.

Can someone enlighten me on how one takes advantage of these new audio formats.

Thanks