I found this gem a few weeks ago and pinned it along with a few others to the Alabama state map. I thought it had an analog controller, but it had a digital one. you can hear some others in the area with analog controllers when the siren points away from the camera and after it winds down. I have a feeling that some of those might be driving some of the newer heads on the sirens in the surrounding area.
https://www.youtube.com/watch?v=UMVSXhcx80Q