But I can copy and play the copy fine? If the computer cd reader has
XX oversampling and corrects for the errors I'd understand but it just
seems odd.

It's almost like the NAD had a problem translating the bits on cd to
the DAC. I guess the only way to isolate if it's the transport is to
use the Coax and pipe the binary into another DAC, like a newer amp
with PCM coax inputs (Panasonic XRs?)