A (very prolific and talented) youtuber curiousmarc has a bunch of vids about (among many other fascinating space, flight, nav, instrumentation topics) atomic clocks and getting them sync’d with GPS. It’s, like, 85% out of my league but damned if I can’t feel my brain getting bigger watching his vids.
I’ll just post this latest one from a week ago but he has lots and lots.
The simulation @DavidNRockies posted above plays the WWV audio. I’ve never heard it so clearly but it definitely sounds just right, very satisfying.