Gareneau, I must say that I am repeating a pro guy who is at the edge of the art. He says that Sony and Philips devised a way to put copy protection on DSD recordings in doing their SACDs. He merely undoes this effort, as Playstation 3 allowed to get back to the DSD information. I compared a universal player playing SACDs to what I had on my music server by him playing the DSD that he had gotten off those same SACDs. There was much greater clarity and transparency.
Finally, as to why Sony is getting DSD out mainly on old recordings is that those tapes are deteriorating and approaching being lost. I have heard much discussion that all Sony's master tapes will be captured on quad DSD digital media.