The Siren Board

I have contacted whelen about an audio file of the Westminster signal that is normally programmed as a digital voice message. they could not give me the tone. does anyone have a audio file of the tone?

You can't really extract the tone set from a Whelen siren in any reasonable way.
I suppose if you has direct access to one. You could possibly tap the audio lines coming off the control board and through an attenuator pad get a correct voltage level for running into a recorder of some sort. But you would need direct access to a siren. The only one I know of that has it, is not easily accessable and is in use in the town that owns it.