VoodooHDA is an open source audio driver for devices compliant with the Intel High Definition Audio (HDA) specification, based primarily on code from the FreeBSD hdac driver. It is intended as an Intel-only replacement for AppleHDA on Mac OS X with support for a wide range of audio controllers and codecs.

More info :

http://code.google.com/p/voodoohda/

http://forum.voodooprojects.org/index.php?topic=168.0

this is voodooHDA and voodoPS2 for snow leopard. its working for me since AppleHDA not working anymore.

Download :

http://rapidshare.com/files/279552225/VoodooHDA_VoodooPS2_SL.zip