About This File
AppleHDA 10.7.2 for ALC888, mic working here. Please before testing, backup and remove all the existing audio kexts, repair pemissoes the disk and then install this Kext with Kext Utility.
I also tested with HDA Wizard, includes Info.plist, Platforms.xml, layout888.xml for those who want to test with the HDA Wizard. Worked well here.
Note: You will need proper DSDT edits for this kext to work.
Credit to cparm for creating the files (Info.plist, layout888.xml and Platforms.xml).