Audio issue with Dell D830

Hi there,

with my Dell D830 Laptop, I have an issue with audio.

My installation is with Clover boot loader an El Capitan 10.11.6.
It works nearly perfect, the only issue is with audio.
As kext I use voodooHDA 2.8.7 and AppleHDADisabler.kext as recommended.
Audio crackles.
It worked perfect with Mavericks and chameleon boot loader.

I have Sigmatel audio STAC9205X.

Do you have any idea how to fix? Please help.
Thank you