Yes, I know that. They run run-throughs my area all the time in conjunction with PAR.
The Canadian railways have a different standard for their horns, according to the link I sent you which has samples of all kinds of horns including the ones you mentioned, albeit, very vaguely. Who made the models, which I was asking? The content creator will have the horn that you can find on the DLS or is in their content supplied with the model.
The train horns are tuned specifically to certain music chords. Some of them are in augmented majors, such as C-sharp major 9ths, or some are tuned with diminished thirds, major seconds, minor seconds, etc.
The Canadian railways use specific tunings for their railroads which is different than that used in the US even for the same model locomotive.
