what I have done: - audigy4 soft and drivers uninstalled and cleaned the PC with driver cleaner. - shut down the PC. - removed the audigy4. - start; entering in bios and checked is the onboard soun is off. - booting in windows and make sure that there is no sound card installed at all and cleaned once again with driver cleaner (creative; realtek and kx drivers). - shut down and installed the X-fi xtreme music. - boot and installed the driver and software from the original CD; - restart - playback with winamp; aimp2 and 3; media player classic and other software after proper setup; sound test in the creative software, THX console etc. and from windows too (win7). NO sound at all but the volume meter in every case was moved and bounced ok (in the console too; checked in the music production mode). - checked with the creative diagnostic tool and everything!! was ok but the testing was without sound. - with the Pax drivers was no difference. - not checked with KX drivers and I am not sure 100% if I had checked or not the digital output only but I do not think that this option is selected from default after an clean install. What can I do? there is any chance to "remove" this problem; I can not return the card because was bought second hand from some internet market place. Le: checked on 2 different PC's one with Xp and the other with Win7 Thanks.