OK, i have not researched this specifically. but here is my logic and belief. If your transport outputs S/PDIF as the digital signal to the DCA, that is a standard. I know of no encryption on S/PDIF since it must be backwards compatible.
This makes me believe that there is no problem so long as your transport decrypts the SACD. SACD is basically DSD.
G
This makes me believe that there is no problem so long as your transport decrypts the SACD. SACD is basically DSD.
G