[PLUG] CD player sound and aux. cable?

[Alex Daniloff]

Hello Linux folkz,
I just noticed one interesting thing on my SuSE 9.0.
I can't listen to misic CD using KDE cdplayer, 
but I can watch DVD movies with sound using xine, and
KDE sound schema is working too. 
If I connect DVD ROM directly to the sound card with 
the auxiliary cable, then I can listen to misic CD's 
as well. 
The question is if Linux uses different sound 
services/fasilities for providing sound for DVD movies 
and musical CD's?

Thanks,

Alex