Not too long ago, I purchased a Samsung DVD Player (DVD-HD931) and in the audio options it mentions 2x scan audio, or "Double Scan Audio". What is this exactly? In what situations does it benefit the user? It also offers PCM Down Sampling. Likewise, what is this feature, and how (if at all) and when does it benefit the user? Sadly, the users manual doesn't exactly explain it and I've not found anything by searching Google. Any help is greatly appreciated.