Okay I switched to v2.7.1, and it worked.
Plus, it did fix my performance issues, I'm getting a locked 120fps at max settings. I'm surprised this fix isn't on the wiki, the frametime graph is a night and day difference.
@DrSkum88
I assume YT has a sort of audio quality limit or something so maybe the video audio quality is marginally lower in recording than actual gameplay which could possibly make the quotes sound relatively better.
