Just read through this lot and found it very interesting. Downloaded Soundbyte and had a play. It has many possibilities for me. I have never been that keen on sound fitted locos for a number of reasons. With steam the sound doesn't seem deep enough to me, no doubt a product of small speakers and loco sound in isolation to me is a bit odd. I really like the idea of having ambient sound together with superimposed locos, wheel noise from carriages, wagons etc etc. Driving the loco to the sounds is not difficult and I find more effective given that sound can continue and fade off after the train has reached the fiddle yard rather than abruptly stopping.
Thanks for opening up new possibilities for me.
Roger