I just installed a new video card (Sapphire Radeon 9600 Pro Atlantis, thank you gaftop1) on my Windows XP. The graphics are great, just great, but I have no audio. The speakers are on, the system's volume is up all the way and unmuted, and the device manager says everything is working fine with no updates available (codec-wise or driver-wise). I've tried restarting and reinstalling the drivers, but to no avail. There is no sound at all. What am I doing wrong?