DMC files are used by Mimic and Lip Sync in DAZ Studio to make a figure move lips in response to an audio file. DMC stands for DAZ Mimic Configuration I believe, and each figure generation needs a specific file to make this work. Every figure including Genesis 3 had such a file in a somewhat hidden directory.
For Genesis 8 (male or female) the Genesis 3 file can be used. In the above video I’ve used in on Michael 8. Here’s where to find those precious DMC files:
Windows
Program Files (x86)/DAZ 3D/DAZStudio4/plugins/dzmimic/Configuration_Files
Some files can also be found under
My DAZ 3D Library/General
Mac
On macOS I’ve only found them in the Library folder under General.