It just becomes a question of substitution.  You need to pull the drives
out and bread board them so you can pull the sound cables and
try the different sound card inputs with each drive and localize the
problem to wires, CD drives, or the sound card.
If it turns out the sound card input you just started using (if I read
this correctly) is bad or distorted, there are special mixer cords
available that join two CD-Rom drive sound outputs into one
sound card input.  http://www.cyberguys.com/ and Microcenter
have them for around $10(US).

I have sound cards with up to 3 stereo input channels, so I would
think the sound card would/(should) work "as is"...
                            Rick Glazier

From: "Paul Hachmeyer" <[log in to unmask]>
> I added a second cd-rom drive to my daughter's pc last night
> so she could listen to music while playing games, etc. with
> the original cd drive (different brand and model).
> The second cd drive plays with clear sound, but the original
> cd drive now sounds fuzzy.  I tried a different cable to the
> sound card, checked for pinched wires, no change.  Sound
> card has 4 connection points - aux1, aux2, and 2 cd
> connections with different shaped connectors.  Aux 1 and 2
> provided no sound, I plugged the 2nd drive into the unused
> cd connection.
> The machine has 2 hard drives on primary cable as master and
> slave, cd drives are on secondary cable, also as master
> (original) and slave (new drive).  Running win98se.  I did
> swap the secondary cable since I needed more length between
> the 2 cd drives than the original cable had.  I did not yet
> try a different cable.
> Any ideas how to clean up the sound?

               The NOSPIN Group Promotions is now offering
              Mandrake Linux or Red Hat Linux CD sets along
         with our NOSPIN Power Linux CD...  at a great price!!!
             http://freepctech.com/goodies/promotions.shtml