You can hear a demo of this horn here:
https://www.youtube.com/watch?v=451AL3NZ7mc&t=106s
A horn for the BR Class 31. I felt this game could use some variety, so I decided to make a few custom horns. You may also be interested in:
My New BR Class 37 Horn for Trainz https://www.youtube.com/watch?v=ny_61W9MfEU&t=45s
My New BR Class 86 Horn for Trainz https://www.youtube.com/watch?v=MF63wCXAiXs&t=1s
Trainz Horns: BR Class 47 https://www.youtube.com/watch?v=Nrk1PQSs0OY&t=2s
My New LNER A4 Whistle for Trainz https://www.youtube.com/watch?v=SH7k1VTgOec