Quote:
Originally Posted by the-cable-guy
digital audio out & 5.1 are two different formats. while digital audio out will be better then standard stereo, it wont be as good as 5.1 so if you want a better sound but cant have Sky +/HD for whatever reason, then digital audio out is the way to go.
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The digital audio out (SPDIF) will only be noticably better if the DAC in your amp is much better than the components in the STB, the analogue and digital outputs are both derived from the compressed mpeg1 or mpeg2 audio that the source channel uses, so your STB has to decode it. You won't notice much difference between the two outputs for standard stereo audio.
The DD signal however does not get processed by the MPEG encoders, or your STB, its a data stream which stays the same all the way from the Dolby digital encoder of the broadcaster to the processing on your amp.