Sound Card not Working

I have a sound card that is not working correctly. There is no sound. What to do?

First of all, you should check that the sound card is detected by the PortAudio device handlers, by using the ListPortAudioDevices command. You should also check that you are using the correct sound card/API. This can be checked by running any video-enable application in verbose mode, and checking the application debug output.

Secondly, on Linux systems there is sometimes the problem that Ubuntu (and possibly other distributions as well) ship such old versions of PortAudio, that they do not work with esoteric sound cards. In these cases one can manually upgrade to newer versions of PortAudio. In practice one should then take the PortAudio release directly from the PortAudio SVN repository, as the official releases can be badly outdated.