John Sullivan wrote:-
Sound is an integral part of the character of certain locomotives, the GM66, Class 40 and ex-WD being extraordinary examples. Without it they are like so many others. As a general rule we only animate the locomotives on our layouts and by default the wagons and coaches they pull. We don't usually animate the vehicles, people, buildings, rivers and in most cases - although not yours - they would be drowned out by the sound of locomotives anyway. There is no reason why a sound fitted loco could not be used in conjunction with a conventional background sound recording.
(kim)