Recovery Clock Jitter
There actually are cases where data clock recovery PLL circuits are so poorly designed that jitter in the recovered clock signals can introduced audible distortion in the playback, as the output D/A clock will not be very good. This was the case in a lot of early CD players, and was responsible for kicking off the $1,000 digital interconnect cable frenzy in the early years. This is not much of a problem in modern equipment, though, as most integrated circuit designers are VERY aware of this type of clock jitter problem.
You can't blame somebody for trying, though :-)
Biting the hand that feeds IT
