1. Winamp > Ctrl+P (for preferences)
2. Plug-ins > Output
3. double click 'DirectSound output'
4. Driver tab
5. make sure the device in the drop-down list correctly reflects your soundcard
-and/or-
1. Control Panel
2. Sounds & Audio Devices icon
3. Audio tab
4. in 'Sound playback' make sure the 'Default device:' drop-down box correctly reflects your soundcard