This is from http://magiex.netfirms.com/

1. Sound
There are 2 types of sound drivers you can install, either the default kernel drivers or the ALSA sound drivers. ALSA drivers are more customizable and work well with programs which have specific sound requirements otherwise default drivers are better just for music and default drivers have better sound quality for mp3.

Default Drivers
To install the sound card using the default drivers that come with the kernel modules; add the following lines to your /etc/modules.conf file:

alias sound-slot-0 sb
post-install sound-slot-0 /bin/aumix-minimal -f /etc/.aumixrc -L >/dev/null 2>&1 || :
pre-remove sound-slot-0 /bin/aumix-minimal -f /etc/.aumixrc -S >/dev/null 2>&1 || :
options sound dmabuf=1
alias synth0 opl3
options opl3 io=0x388
options sb io=0x220 irq=5 dma=1 mpu_io=0x330

If that didn't work for you, you can try the one below:

alias sound-slot-0 sb
options sound dmabuf=1
alias synth0 opl3
options opl3 io=0x388
options sb io=0x220 irq=5 dma=1 mpu_io=0x330

The above lines were automatically entered using the sndconfig utility, although it doesn't detect your actual sound card, you can tune compatible sound card settings to match your settings. Also for the above to work, you must have the required modules, when you look carefully it is using the sound blaster's module.