KDE CD Player and aux. cable?

Hello SuSE 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