From what I can gather, it seems that most of, if not all the sounds 7DTD uses are not stored directly within resources.assets. assets files to see how they're structured, along with a bit of my own research on how Unity 5 streams media during runtime. Using this tool and Grim's UAE, I've been doing some poking around inside the.
So, I've been wanting to mod some of the in-game audio for a while, but I've hit a bit of a snag when it comes to extracting audio clips and such.