Are there any .ini settings that affect NPC dialogue fade depending on if / what angle you're facing them? Their voices are very quiet even at full volume, and their voices fade to silent when I am directly facing them.

Any help or advice in this issue is greatly appreciated!

Thank you,
Irradiated Ivan

I don't know of any specific tweak in the .ini files or anything, but maybe you could try downloading one of the bug fix compilations on the Nexus. I'd link you but the site is down for me at the moment. They might fix your problem.