In Absentia is a DVD-A, not SACD. In DVD-A, it is a higher-quality recording. In DTS mode, it is lower-quality, though I would say not audibly lower quality. I only have the ability to play the DTS layer right now (no analog ICs for my player) and it sounds INCREDIBLE compared to the stereo mix. Don't get me wrong, the stereo mix sound very good, but the surround implementation is amazing. I consider it a reference for what surround music should sound like.