Hi kounelos,
The focus here is to achieve static free clear audio output quality so i am sorry that i am unable to comment about the mic line input audio issues that you are experiencing as i do not have a microphone.
Here is how i recommend you apply Toleda's solution;
- locate your boot drive Systems/Library/Extensions folder
- once in the Extensions folder, i recommend you switch the viewer icon to a text list view and you will locate the following kexts (below) much easier alphabetically
- locate your current OSX 10.9.x AppleHDA.kexts (as modified by MultiBeast 6.x) and delete it
- locate any HDAEnabler.kexts and delete them (sometimes there's more than one, e.g, HDAEnabler1.kext and HDAEnabler2.kext)
- after deleting the kexts, exit from your S/L/E folder and return to your desktop
- Download and run MultiBeast 5.4.3
- select Drivers & Bootloaders > Drivers > Audio > Realtek ALC8xx > ... the version that corresponds to your motherboard's Realtek version and install the correct audio kext.
- When done, Reboot and then launch Disk Utility
- select your boot drive in Disk Utility and Repair Permissions
i applied this fix on my DS3H and it's a winner - credit goes to Toleda for the tip
if we can get the same feedback results from other posters here then the thread should be marked as Fixed !