It's only for the Bentley.
I wanted to help, to get the Sounds sound better and so i tried to import them into Audacity, which i use to convert the Sound Files to Mono now.
But Audacity wasn't able to load them, because of an unknown Format.
But they all have the wav Extension.
So i converted all of them with an online Tool (
https://online-audio-converter.com) to *.wav again and also to Mono.
And that did fix the Problem as you can hear in the below Video.
So there is probably something wrong with the original Files, that they have an improper wav Format, that sounds bad in rFactor.
Here are the new Files:
Download
BTW There are some Sound Files missing (Message Popup in DevMode).