Fix for 5.1 audio
If you look in your Program File\DVDFab 8\Profiles\Readme you will find a file called profile_document.xml which you can left click on and open with edit.
If you read it you will see that you can select 5.1 channel by having:
which supports multi-channel, and
which support 6 channels (i.e., 5.1), in you profile.
To get this to work, I was using the generic.mp4.h264.aac.xml profile to rip.
You can find it in Program File\DVDFab 8\Profiles
Again left click on file to open, and edit and/or add the above lines, and save.
Here is what my version of generic.mp4.h264.aac.xml looks like:
Now when I run MediaInfo on the ripped file it reports:
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format version : Version 4
Format profile : LC
Format settings, SBR : No
Codec ID : 40
Duration : 1h 59mn
Bit rate mode : Variable
Bit rate : 192 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Rear: L R, LFE
Sampling rate : 48.0 KHz
Resolution : 16 bits
Stream size : 164 MiB (16%)