Newbie trying to install Soundcard on Debian Linux

[Marion Hall]

What’s the easiest way to install soundcard drivers on system.  I’ve setup an Icecast server and I need a working sound card.  My computer (Gateway) has an onboard soundcard, but if it is easier to install a soundcard, then I can do that.  Also, how do you go about testing the sound card once the driver is installed.