1: Download the VoodooHDA file in the sticky.
2: Download Kexthelper:
http://cheetha.net/3: Open Kext Helper, drop the Kext into the window, type in your password and hit install.
4: Double click the VoodooHDA prefs pane to install it.
5: Drop voodoohdahelper somewhere smart like your Utilities folder, go to your Accounts prefs pane, and add it to your Login items.
6: You MUST remove (and backup, of coarse) any conflicting Audio Kexts from your /system/library/extensions folder. I. E. AppleHDA, HDAEnabler, AppleAzaliaAudio.kext.
7: Cross your fingers and restart.