I don't cover the patching process but you can follow rehab man's guide for that + i already have linked in this thread the insanelymac's files for alc1220 which includes the DSDT patch although i didn't use the AppleHDA rather AppleALC + Lilu.If you are interested check the files + toleda's...
Prologue (Optional Read !);
Since the motherboard seemed to be very popular around tonymacx86's early adopters, I thought I'd make a quick guide on how I got everything working. I won't discuss how to patch your DSDT here since there are plenty of guides made by RehabMan and other excellent...
https://www.tonymacx86.com/threads/guide-patching-laptop-dsdt-ssdts.152573/ only that you are not making laptop patches of course ;) and that you need the audio patch and HDMI audio if you want it too ;)
i patched the CPU PM also through my DSDT so i have all my patches together :D
http://www.insanelymac.com/forum/files/download/693-applehda-for-realtek-alc1220-10123/ used these files ( not appleHDA rather AppleALC+Lilu) and patched DSDT using the patch in the files and rehabman's guide ;)
clover update->s/w update->web driver update->everything working as before.
only one question; if you guys go to system info(app) under h/w there is an iBridge option.any idea what is this for?also on graphics i got a new option saying "automatically adjust Brightness :No".any ideas?