I have been playing with this kind of 2 channel config for the past two years and despite what all the manuals say and with everything I read about setting the player to LPCM, I get a far better sound out of DVD and Bluray by sending Bitstream to my HD621/G61RSL. When I send LPCM I get a standard stereo sound but when I send Bitsream I get a true Movie sound, meaning super Dynamics and clear voices. It's like adding a sub and is no contest sonically. There is no difference in configuring the HD621 from 6 ch to 2 ch when sending Bitstream that I have heard. I suspect I may be getting a DTS signal that the G61 is mixing to 2 channel. It sounds so much better that for the first six months while my source was set to LPCM I had no real base or significant dynamics. I even bought a sub because of it. Then I changed my player to Bitstream and didn't need my sub any more. Dialog is also great.
I have searched the forums for what the HD621 'Types' mean, thinking that maybe I need to choose a type and then will be able hear the High Def Codecs like True HD but still have not found anything. I don't believe I am getting them set up with 2 channel.

This LPCM topic makes sense on paper but there is no way I will watch a movie with my source set to LPCM. It does not sound as good.

I would love some feedback.

DSP7200SE's, G65, HD621, Theta Digital Compli Blu, AppleTV, Runco 65THX Plasma, F80