I understand the technicalities, let me explain what I am trying to understand here...
The "Use native DSD on USB" option, should only affect the USB interface, and should have nothing to do with the AES/EBU, Optical BNC, or SPDIF interfaces which the Aurender offers.
But, when I have the same setting On, and I listen via the AES/EBU out, why would AES not play the DSD files?.... Funny enough, the minute I turn the setting off, AES has no issues playing back all my DSD resolutions, from DSD64 to DSD256!
Something makes no sense here.