If you have installed Linux and it didn't automatically recognise your sound card and configure it for you then you can attempt to install support for your sound card manually. You may also want to do this if you have added a sound card to your system or have replaced the existing sound card with a new one.
To run the sound configuration utility you need to be signed in with administrator access. Usually the easiest way to do this is to either sign in as root or to type su at a command prompt. It is also safer if you perform this operation with X Windows shut down.
At the command prompt type in cd /usr/sbin to swap to the directory containing the sound configuration utility then type ./sndconfig to run it.
The sound configuration utility will run you through a series of steps to first probe for your sound card and then to configure it. If either the probe or automatic configuration steps fails then you will be given the option to manually supply the necessary information. The facility will also play two test sounds to assist you in ensuring that you have the configuration options correct.
This article written by Stephen Chapman, Felgall Pty Ltd.