I just replaced my Sony DVP-S530D with a DVP-NS315 because of the compatibility the 315 has with CD-R and DVD-R. However, I don't see anything about the 315 having a built-in Dolby Digital decoder. What's the difference between having one built-in and not? I have a DD Harman Kardon receiver, so does the decoder have to be built in to my DVD player to take advantage of it, or does my receiver decode it? I used to sell this stuff at Circuit City while in college, but I've forgotten it all!

you only need a DD decoder in your player if your receiver lacks one and has 6-channel analog inputs. since your HK has a DD decoder, all you need to connect the dvd player to the receiver (audio-wise) is a single coaxial or optical cable.

Please take a look at the first page or two of the forum before posting "new" questions.

This recent thread, in addition to mdX's info above, should give you all the info you need. Otherwise, feel free to post in the existing thread.