Sounds with .animated files

For me, one of the most important things is to have ability to play / stop sounds within .animaed files. This would be helpful for crossings, passing trains, switches and many more. It is just silly to hear the crossing when the train is 5 miles away...

Sorry for bumping an old topic up, but there has been no response and I was wondering is this has been taken into consideration... I have no idea how difficult it would be to do this from the programmer's point of view...