In the AVS forum there is sevral theads on this here is on quote
In the few posts where I have seen this claim, the posters were confused. Here's what happened. When the 2-channel optical output from their TV was sent to their AVR, the AVR was set to output 5.1 channels regardless of the input. So, the AVR was using one of the multichannel surrround formats (Dolby PLIIx, Dolby PLII, DTS NEO:6, etc) to convert and present the 2-channel as 5.1 or even 7.1 channels. The AVR delivered 5.1 channels but it was not the 5.1-channel track that was originally with the source material.
As noted before, for DRM reasons, these sets can not pass DD 5.1 channel material except from OTA sources.
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