This was first posted at Uphuck forum by Pere. i tried this last night and my Intel High Definition Audio worked immediately after installing the kext and removing the AppleAzaliaAudio.kext, I did not even need to reboot my HAC after installing the kext.

Here is download link of compiled kext:
http://ul.to/6j9jc0

Install to System/Library/Extensions and erase ALCinject or HDAenabler if you have it. Nothing else.
Move out from your extensions folder the driver Appleazaliaaudio.kext so you know the patched Azalia audio driver is not interfering.

Main project place:
http://voodoohda.googlecode.com