I think it has to be the way you ended up with...PCM is the cd format. I don't know what the dolby digital out format is, but it seems like it doesnt conform to the cd standard. There is probably someone out there who is more sure of this than me, but I think you got it right. And even if you had a digital INPUT on your Pioneer that accepted the digital out of the dvd for audio, the theta dac (whichever one it is) should be better at d/a than the receiver.
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