To find out why, just search for "rip SACD" and you'll get lots of threads in lots of places all coming to the same conclusion... There's no way to read the unencrypted digital audio from an SACD disc with a computer*. No hardware, no software.

Your easiest bet is to do an analog capture of each channel using a good player and a good capture card. Then save the channels to an AC3 file on you computer.

The situation is unlikely to ever change in the future because the SACD format never achieved any significant market share.

*I did find one resource for possibly capturing an unencrypted digital signal using a custom board for a Denon player:

https://www.dvdupgrades.ch/product/Modif...oard/24308.html