To understand why these formats are highly sought after, it helps to understand the technology behind them. Direct Stream Digital (DSD)
A Super Audio CD (SACD) is a physical optical disc designed to hold high-resolution DSD audio. Because DSD data requires significantly more storage space than PCM data, SACDs utilize a disc structure similar to a DVD or Blu-ray rather than a standard CD. sacd dsd torrent link
To stay safe while sailing these waters: To understand why these formats are highly sought