Hi i have suse 9.2 with sound blaster 128 pci,,,
the system have found my old soundcard correctly... The first problem is that the mp3 files play with a lot of background noise and the second is that i cant play conncurently multiple sounds from different programmes which means that if i play a mp3 file i cant hear the kde's sounds... What do u suggest me?
I use alsasound server

First: What version of kernel are you running: Try uname -a

Noise could be that your sound system (ALSA) translates the sound from one bitrate to another.

Try check the load when you play mp3:s: Try top

If your programs try to use ALSA directly, this is your problem. Use ratsd to output sounds (or what the name of KDE:s sound daemon is).

When one program opens a sound device in Linux, it has monopoly ont that device. All other programs has to wait until the first program stop using the device. With ALSA it's ways to get around this. See ALSA:s home page.