In the example above, the driver snd_ich was loaded.
You should now be able to use the sound card.
To load the driver automatically when booting, add the following line to /boot/loader.conf:
snd_ich_load="YES"
(Remember to replace the driver with the one displayed by 'cat /dev/sndstat'.)
Only if things still aren't working:
If, for some reason, there is a problem to load the sound kernel module, a fix is to enable sound support in the kernel:
# cd /sys/i386/conf
echo 'device sound' >> YOURKERNELCONFIGFILE (default is GENERIC)
/usr/sbin/config YOURKERNELCONFIGFILE
cd ../YOURKERNELCONFIGFILE
make depend
make
make install
reboot