The last couple of nights before I went to bed, I hear an upbeat percussion music, It lasted a few minutes, then stopped. I could not tell where it was coming from, but I have always had quiet neighbors.
Then I noticed it after I laid down for a nap in the middle of the day.
Suddenly, I started noticing it happened whenever I went to sleep.
What was different? Why ws I hearing voices?
Eventually I figured out that it was the "hibernate" warning from my new computer.
The music is nice, and now that I know it is not all in my head, I sleep a lot better