Well, one way I could think of.
zumbo said:
How would one determine which unit had a better digital analog converter?
First, connect the CD player's digital output connected to a digital input on the receiver, say the DVD input. Odds are if you're using a DVD player it already is.
Then, connect the CD player's two analog (red/white) outputs to a different analog input, say the CD input.
Now, play a CD and flip between the two inputs. Which sounds "better"?