The horn squeaks above the cab car in external view when passing from the hornstart to the hornloop or the hornend audio files. I would upload a video but that's not a thing on the forums.
https://cdn.discordapp.com/attachme...82374922/Desktop_2020.10.17_-_17.13.25.01.mp4 that squeaking bug thats present on MSB 185/146 horns (because of the poorly set up cues) and now very much the class 377