I heard this information on the HT Guys podcast #145 were they talked to two guys from Dolby. They said that sound can come from three places. One of them is called button sounds. One is the regular soundtrack, and if you have the ethernet in your machine, you could stream direct comments into the player. The player would then mix all of this. If you sent the signal to the receiver, you will miss out on two of those features. If you don't care about this, then it is not a big deal, but if you want it, your machine will need to do the decoding. I think I understand what they were saying. You can always go listen for yourselve, but I think I got close to what they were saying.