Before last year, I was using my Adcom CD player's Digital Out to a
California Audio Labs Sigma-II DAC, and then to my PreAmp.
Last year I upgraded to the Outlaw 990. In doing so, I no longer needed
to use the Sigma DAC, since the "upsample" on the 990 did such a good job.

I have recently found this product called the Genesis Digital Lens.
It is primarily is used to remove Jitter from the digital signal, but it can also "upsample"
the bit count.

I am wondering if this would help any with digital CD music.
There is no mention is this product will work with DVD, but I would think not, since audio on
a DVD is at a higher sampling rate than a CD.

Info can be found here:
http://www.genesisloudspeakers.com/archeology/Digital_Lens/Digital%20Lens%20Quick%20Start.pdf

and here:
http://www.genesisloudspeakers.com/archeology/Digital_Lens/Digital%20Lens%20Brochure.pdf