That didn't change anything. But here's the weird/interesting thing: had to get a video created - mic as input worked fine (hadn't been an issue yet), loaded the video (35 minutes long) into Filmora for editing and as I was playing it back and working on it, audio never once cut out. Filmora nudged out whatever was causing the problem...
Playing a music video while exporting my edit. Still hasn't cut out. Will it fail once I close out of Filmora??? Yes. WTF?
So with Filmora running, audio never cut out. As soon as I closed Filmora, 10 seconds later, audio dropped.