Been at Wirksworth show this weekend. There were three DCC sound layouts in the Parish Rooms. Two American layouts and my own layout Church Lane Sidings. At NO TIME was the noise obtrusive and indeed, at times, could hardly be heard over 'noise' of the paying punters. Unrealistic? I don't think so. When ex railway men are commenting on how the sound of a Cl25 or 37 bring back memories of when they drove them then, in my case, I've acheived what I intended with my layout. Does this mean you find steam sound intrusive?