You know that 1020hz Modulator video I uploaded a few weeks ago? Well, this is the same siren with the Thundermod tone applied to it. The wind-up and wind-down ambiance was awesome.
Anyways, enjoy.
I recorded this with Sirens And Railroads of Oklahoma. Link to his channel can be found in the description.
https://www.youtube.com/watch?v=A9n1ZRxQVZw