Describe the suggestion
It would be very nice if you could add a control group sound definition.
So that the sound is bound to a control group and not to a widget, because the implementation via the widget is rather bad than right. Like what is done with idle, running, horn etc. That should then also include the normal sound definition (start, main, looping, stop, distance, volume).
In the implementation this would then be so that I have a control group, which I can control via a TOGGLE or PRESS and as long as this is active, the sound is played.

Applications of the suggestion
This would also allow custom sounds to be set to control groups when creating vehicles, to realize various things like fans or similar.

Kind of pointless as now with he new animation system you can put the sounds on the animation

But I dont want to use the animation system for that. Please standalone. The animation system is trash for this.

With buttons in the rolling stock

How would you actuate the control group? Via the UI? If so, I've already added that in the PR you saw this morning.

So I dont want the move, engange, disengage stuff but the normal sound defintion with start, main, stop, looping...

engage / move / disengage is all that will be supported for control group sounds.