It is impossible for people to help you, and we would only be guessing at solutions, without this informationProfiles need to contain at least your primary system to assist others with helping you.
What audio codec?Is there a kext for my specific board for audio to work with El Capitan?
What audio codec?
What kext?ACL 892 but the kext does not work.
What kext?
What did you select?The kext that is installed with MultiBeast that supposedly makes onboard audio work.
What did you select?
Try again, reply with screenshot and log.checked "ACL892" and hit build then Install