Thank you for this.
Now all of the soundcard is working on my P5B-Plus. It is ADI1988.
Digital Out works also that's good for my digital monitor speakers.

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Asus P5QL-Pro
Core2Quad Q8200 RAM: Kingston 6GB DDR2 667
nVidia 9400 GT Dual Monitors at 1440x900
OS X 10.7.2
M-Audio Delta 66 with Omni I/O
LAN: Realtek8102EL (works)

The mic and line in do not work.

I have inputs showing up. Volume is turned up to max. Nothing gets recorded.

I am using the frontpanel ports on a Dell Optiplex 745.

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Dell Optiplex 745 Q965 Chipset
10.5.5 retail /boot-132/ EFI.
System.plist edited to 10.5.6 (needed for iWork'09)
Intel HD Audio ADI1983.
1152x864@32bit ATI (0x1002 0x7187 0x0000) Radeon X1300. Hardware accelerated. QE supported. Can't get my monitor's 1440x900 resolution as in Linux
Network : Atheros 5005G (0x168c, 0x3A1D) card aka Atheros 2413.
Dell Latitude D830 Nvidia Quadro NVS 140M, Suspend works, hibernate/shutdown/reboot don't Snow Leopard

I'm having some issues with my AD1984. I get crackling/distortion when listening to music in itunes or songbird.. but its not constant. Usually happens at the beginning of a song, but it won't happen again after the first time. I can play a song once, then when I go to play it again there is no crackling.

I did install this new Voodoohda.kext but it doesn't seem to have fixed anything.

Edit: after reinstalling Voodoohda.kext using kexthelper all is well on the sound front. :]