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If: "My soundcard doesn't make any sound." Then: Make sure your audio hardware is supported by your sound system.
Check the ALSA Soundcard Matrix to see if your card or chipset is listed.
Problems at these points will likely cause audio distress.
The following "laments list" is of course incomplete.
Make sure the right connections have been made: You'll have little success adjusting everything else if your guitar is plugged into a speaker output jack instead of the line-in.