A good first way to check the basics of your setup for high-test audio, is discussed here:
http://wiki.linuxmusicians.com/doku.php?id=system_configuration
However, at this writing, there appears to be some confusion. The way I do it at present, is to get to a superuser shell, then:
yum install mercurial hg clone https://realtimeconfigquickscan.googlecode.com/hg/ realtimeconfigquickscan cd realtimeconfigquickscan ./realTimeConfigQuickScan.pl
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