Whistling While I Work?

Caught this earlier today. Knew damn well I heard whistling but I couldn’t tell where it was coming from.
Turns out, after checking all the cameras, it appears to have been generated from the front room.
Maybe whoever was whistling, was trying to help call the dog? Or maybe “they” were whistling while I worked lol, who knows.

While I did hear it in 3 cameras, it’s barely audible in 2 of them so, I didn’t bother adding those clips.

As always, I stitched together the original and enhancements with text