Make sure you have the emu-tools installed.
<
http://sourceforge.net/projects/emu10k1>
In Redhat 8.0 I believe the file emu10k1.conf in located in /usr/local/etc. Change <USE_DIGITAL_OUTPUT=no> to <USE_DIGITAL_OUTPUT=yes>.
If you want to load the emu-script on startup add these lines to /etc/modules.conf.
#Loads script on startup
post-install emu10k1 /usr/local/etc/emu-script
#Saves mixer levels
post-install emu10k1 /usr/local/etc/emu-script restore
pre-remove emu10k1 /usr/local/etc/emu-script save