KJ> I'm mystified, which is quite easy to do. I upgraded 'puter with
 KJ> PCCHIPSp4m800pro, intel 3.2 and included a DVD rw.

ok...

 KJ> This motherboard has AC97 audio. and here's the mystifying part, I
 KJ> did not use a audio cable from the DVD to anywhere on the
 KJ> motherboard or it's cards. The point is I can play a movie DVD with
 KJ> SOUND. How is this possible??????????????

the sound cable that generally goes from the CD/DVD to the sound card is
for analogue sound like you find on music only CDs... all other types carry
the sound in the digital stream which the software properly decodes and
sends to the cound card...

)\/(ark