Yeah, just to clarify on the above question, you CANNOT use optical/Toslink or coax digital connections for Dolby TrueHD. For Dolby TrueHD (and Dolby Digital Plus and DTS-HD High Resolution and DTS-HD Master Audio for that matter), you MUST use either a HDMI connection or a 5.1/7.1 analogue connection.
Optical and coax digital do not have enough bandwidth to carry the new audio formats. Optical and coax digital can carry a Dolby Digital, Dolby Digital EX, DTS, DTS-ES, DTS 96/24 or 2.1 channel PCM bitstream signal.
If I had my way, there would be no need for all of this confusion. Dolby TrueHD and DTS-HD Master Audio both deliver lossless, bit-for-bit studio master quality. Uncompressed PCM can also deliver the same quality, but requires signifcantly more space and bandwidth to do so.
But my point is that there are three viable solutions for bringing pristine quality audio into our homes. With that many options, why on Earth should we settle for anything less?
When it comes to HD-DVD and Blu-ray, there should simply be a standard in place that EVERY SINGLE TITLE offers at least one of those three options. And EVERY SINGLE PLAYER should be able to decode and mix all three of those lossless audio formats.
If that standard were in place for all hardware and software, then all you would need is the 5.1/7.1 analogue inputs on the back of your receiver or any version of HDMI with the ability to process uncompressed multi-channel PCM in the receiver.