FreeBSD 6.2 Realtek 音效卡

http://people.freebsd.org/~ariff/lowlatency/
http://people.freebsd.org/~ariff/lowlatency/README

經過一番處理，小兔讓我的電腦會說話了！

0. _Remove_ _all_ sound support in your kernel! Do this first before
  anything else!
(將 /usr/src/sys/i386/conf/BLAH 中 device sound 等等的註解起來)
(在 /usr/src/sys/i386/compile/BLAH 下 make all install)
1. Extract, dump everything into your kernel directory typically
  "/boot/kernel"
2. kldxref /boot/kernel
3. cp soundcard.h /usr/include/sys/
4. Reload _ALL_ sound modules, or, reboot.
(最後在 /boot/loader.conf 內加上
 sound_load="YES"
 snd_hda_load="YES"
)