The sounds on main spessart bahn are broken endless looping on motor sounds is horrible and there is very minimal track noise. Same on most preserved routes.
The sound volume "mix" on the preserved routes is mostly wrong. Either the trains are almost silent or too loud, or the switches are too loud, or pulling down the windows don't change the noise, etc.
The sound is terrible on msb and the same when the locomotives are used on Koln-Aachen. I'm so disappointed. After 5 minutes, I turned the game off. It completely destroys the simulation. How these can happen and still be released is beyond me.
Rapid Transit sound is even worse. You start entering the underground section and it's almost silent (Talent 2 SB).
This is not the only route. I’ve notice the looping on all the routes and only way to fix is to change camera angle. I’ve reported and sent them audio. They said they will look into it and go in the queue