Assumes layout=1
Install
Xcode - Apple Developer
Install
GitHub Desktop
Clone
GitHub - acidanthera/AppleALC repo
Local repo: install Lilu.kext
Local repo: compile AppleALC (double click AppleALC.xcodeproj) If not successful, full stop
Edit: Local repo/Resources/ALCxxx/layout1.xml and PlatformsT.xml and Resources/PinConfigs.kext/Contents/Info.plist as noted in Customization Guide
Backup edited files
Compile, install AppleALC.kext (~/Library/Developer/Xcode/ ...)
Restart