Can someone tell me why, when changing camera focus to another train, the whistle audio goes just because the train passed a whistle sign when it was not in focus and is now well beyond where the whistle should have been blown? If you passed TWO signs while the train was out of camera focus, you will get TWO whistles. It is annoying because logging railroads have (had) a lot of unprotected grade crossings and whistles were the standard warning for them in the deep woods. When I change focus to a train I have been away from for some time, it sounds off, even if stopped, parked or otherwise inactive.