SUPA

@SUPA The warpme patches need work to implement into Armbian.  That is what I have been trying to do.  When and if we get it right, they should be included into the Armbian system.
 
In the meantime clone my repository, which has the patches implemented, and build your flavour of system from there.
cd ~/
git clone https://github.com/stephengraf/armbian_build_sg.git
cd armbian_build_sg
./compile.sh
 
The HDMI sound should work immediately.
The analog needs to be enabled as @sasa suggested:
 
    /usr/bin/amixer -c 0 set 'Left Output Mixer DACL' 100% unmute
    /usr/bin/amixer -c 0 set 'Left Output Mixer DACR' 100% unmute
    /usr/bin/amixer -c 0 set 'Right Output Mixer DACL' 100% unmute
    /usr/bin/amixer -c 0 set 'Right Output Mixer DACR' 100% unmute

@SUPAThere is a lot more to building a system than just the kernel.  That is what Armbian tries to do for you. I recommend that you use the Armbian build system. You should be able to build the system that you want.
The audio patches do include analog audio, but to date there is still a problem and it does not start up.
 
The armbian-config procedure has options to load kernel headers and also source.
 

@SUPA Thank you for testing the patch.  I assume it worked and that you are working with an orangepisero3.
 
If you want to build you own images follow the directions in the Armbian build manual: https://docs.armbian.com/Developer-Guide_Build-Preparation/
and clone my repository. Unfortunately I have limited space on my google drive.
 
git clone https://github.com/stephengraf/armbian_build_sg.git