The thing is with audio, that the "AppleHDA269.kext" from the ZIP linked above was working under Yosemite but with another Clover + Kexts setup, i just don't know what the difference is / was. It even worked after sleep. But since i reinstalled yosemite to apply the above ZIP on a vanilla enviroment (i had way too much trials and errors on the old one) it does not work. This is why i am confused.
VoodooHDA - i read on forums that the AppleHDA is way more recommended, as voodoo is noisy and buggy. Of course you cannot know till you try, but since AppleHDA worked at some point, i would not give up that easy.