If there is a problem with sound, you can check the sound configuration by clicking: Start-->System Settings-->Soundcard Detection. You will be given the opportunity to play a test sound.
Another less user-friendly way to configure sound is by becoming the super-user and typing:
/usr/sbin/sndconfig
With both of the above methods, the system will be probed for a sound card and then if a sound card is found, it will configure the sound card automatically by changing the file /etc/modules.conf.
There are a few audio samples in: /usr/share/sndconfig/*.au
Another way to test the audio system Is:
cd /usr/share/sndconfig play *.au
record
space to start/stop recording
play
aumix
audio mixing (setting various record/play levels)
sox
converts between all sorts of audio file formats
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