After taking a look at the preview of the ScotRail Class 385, I have noticed just a couple issues with the sounds which can be easily fixed. - Electrical Hum should play from all carriages. - Electrical Scream, currently not implemented, should play from the pantograph. - Traction motors should play from just the driving carriages.
Trains have an idle sound so yea lol. If you've been next to these emus like your whole life then you would be able to tell what's right and wrong
Feedback/ complaining, call it what you will. It's still far to early to give such comments, especially if we havent actually seen any dedicated release media yet. Most of the current info has been WIP, and even in some cases, definitely early in the production.
When ik with a 450/444 I usually hear an electrical hum before departing to they're Desired (get the joke cuz they are called Desiros) destination