use boot-arg alcid=? and ? is one of the layoutid numbers until you find one that works best for you. so you add it to
nvram /
variable 7C436110-AB2A-4BBB-A880-FE41995C9F82
boot-arg/
alcid=some id# you want to use -v keepsyms=1
https://github.com/acidanthera/AppleALC/wiki/Installation-and-usage
hackintool should also give you a selection of layoutid's for your codec.