Well, my mantis and NVDA are still not playing nice. I have tried resetting to factory defaults, doing an accessibility repair, and completely reinstalling NVDA. Still no dice. I am back to using jaws for the time being. I can still hear the audio, but it's taking more work to decipher some words. I don't think I realized how dependent I had become on braille, especially when the word I think I heard makes no sense in context.