The reason why my sound is not functioning because my sound card is creative audigy ls.
Creative Labs Audigy LS alsa driver is called snd-ca0106, but it doesn't exist in my debian, my debian some how detect my sound card but give me wrong driver which is EMU10K1.
Base on this page http://www.alsa-project.org/alsa-doc/doc-php/template.php?module=ca0106
recompile the alsa driver and execute "alsaconf" then my sound card is detected.
Ya, I install xmms to try out. It works!
The firefox is slow while browsing, somehow need to resolve.
Mplayer and xine
bt downloader (hehe)
beautify my gnome