Different (new) question>
will I loose Audio when I try a direct upgrade from El Capitan to Sierra
would a clean install of Sierra be much better, now that I know I was able to install some Audio in El Capitan .
last week I failed to get a fresh install of Sierra (Multibeast&Clover) working with Audio, so I then tried El Capitan and Multibeast, but that did not work to get Audio ALC889 working, so I installed it new (without Multibeast, just Clover/root and Audio, at least Stereo works, do not know how to get analog 5.1 easily working, I fear I will damage everything to just add any modification for 5.1 / not used to Clover.
PS> is there any chance that I can get the in/built speakers of mz monitor *2560x1440) working e.g. via Displazport *either HD graphics 4000 or mz not yet working Sapphire HD5750 graphics card