Some users claim that using VoodooHDA they hear loud bump at system start and sound in system comes with noise.
Although this can be repaired with existing drivers I propose a version that do this automatically.
It started silently and have very clear output. The file is compiled as 32/64 and works from 10.6 up to 10.12.
The sources is in my signature.
There is a VoodooHDA,prefPane compatible with Sierra
Now there is a version 2.9.0 by Zenith432.
It can work with multichannel sound and play it on 5.1 analog system.