Maybe it will help others, so I will leave the info here. If you are missing VoodooHDA prefpane in System Preferences on macOS Sierra and thus cannot setup your mic, you can just add VoodooHDASettingsLoader.app to the "Login Objects" in SysPrefs. After reboot your mic will work.
Update! I've managed to set the DVMT-prealloc in our laptop and successfully boot into Sierra without the MinStolenSize Patch. All Credits go to
@cappicard who figured it out. Here are the steps:
Use the following at your own risk. I assume no responsibility. This is for information only.
I extracted the BIOS using the Universal BIOS Backup Toolkit (
https://forums.lenovo.com/t5/Lenovo...niversal-BIOS-Backup-ToolKit-2-0/td-p/1205920).
https://github.com/LongSoft/UEFITool/releases. I used UEFI Tool NE. I looked for the entry that's labelled Setup (In my case, it's the GUID of 899407D7-99FE-43D8-9A21-79EC328CAC51 and toward the bottom of the tree). I expanded that. Right-clicked on PE32, and hit Extract Body. That gave me an EFI file.
I then used Universal IFR Extractor (
http://donovan6000.blogspot.ca/2014/02/universal-ifr-extractor.html) to convert said EFI file into a text file.
That text file should now have the DVMT values. Just do a text search for "DVMT".
For example:
0x3849A Setting: DVMT Pre-Allocated, Variable:
0x426 {05 91 E3 06 06 07 70 27 01 00 26 04 10 10 01 FE 00}
0x384AB Option: 32M, Value:
0x1 {09 07 E4 06 30 00 01}
0x384B2 Option: 64M, Value:
0x2 {09 07 E5 06 00 00 02}
0x384B9 Option: 96M, Value:
0x3 {09 07 E6 06 00 00 03}
0x384C0 Option: 128M, Value:
0x4 {09 07 E7 06 00 00 04}
The EFI variable is
0x426, and the values are those in blue.
Then, finally you can then boot with EFI Shell (
https://www.firewolf.science/wp-content/uploads/2015/04/EFI-shell.zip). Just stick it onto a FAT32 formatted USB stick. In my case, I added a Boot Option via the BIOS to boot to the included bootx64.efi file.
Upon booting to the USB stick, just type in: setup_var 0x426 0x3 (to set DVMT Preallocated to 96MB).
And voila. (Hope it works for you as well. Cheers!)
You've probably provided the best support I've ever gotten online so far ^^ btw do you take donations? Seems like a lot of hard work and should be rewarded 
