I've been trying to find explanations about priority drops with audiodg.exe but there doesn't seem to be anything. I think it's something new in Windows 10. My suspicion is that it happens because Windows determines the CPU is too busy and tries to reduce priority on "less important" processes that can preempt other processes. The audiodg.exe process has a priority of 22 normally but will drop to 16 and even as low as 6 (which the latest trace did once at the end.) The older traces were frequently dropping to 16 and going as low as 6 sometimes, too. Priority changes were happening dozens of times in the older traces but only 4 times in the latest.
I'll keep looking and see if I can find a reliable explanation.
