Chris wrote:

The question is this; is it possible to make a direct digital connection
from the pc dvd/cd drive to the av amp and use the amp's DAC? If so what
will the sound quality be like compared to a dedicated DVD/CD player
connected to the same amp?

Yes it is, and as long as the digital output from the PC is relatively
free of jitter, the sound will be good.

if the PC output has less jitter than the CD player, the sound will be
better.