Source insensitivity as opposed to "perfect" immunity

[opus101]

Certainly this - The S/PDIF DAPI receiver does -not- recover the S/PDIF clocks for D/A converter timing like most other S/PDIF receivers. It uses an -independent-, local low jitter clock for D/A converter timing. So S/PDIF jitter is no longer relevant. - sounds like a Fairy Tale to me.

 

I can believe that because its software-based it recovers the clock in a different way from hardware-based S/PDIF receivers. What I can't believe is that 'S/PDIF jitter is no longer relevant' - there is no other way to get the timing information to recover the clock other than from the S/PDIF stream.