AVS Special Member
Join Date: Aug 2009
Location: Lancaster, PA, USA
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If your HTPC knows that you only have 2 channels, it should decode DTS/DD to a stereo signal and output that. If properly decoded, you will not miss any audio data. The surround channels are added to the fronts, and the center is split evenly between the fronts.
So instead of FL+C+FR+SL+SR, you get (FL+C+SL)+(FR+C+SR).
You will know if you are missing sound if you can't hear any dialog, since that is normally output from the center channel in a surround setup.