Digital Command Control makes locomotive fleets more realistic with adjustable features and prototypical sound. In this digital article collection from Model Railroader you'll learn the basics of programming your DCC-equipped model railroad locomotives using configuration variables (CVs) and get some practical advice on "consisting" or setting up multiple-unit lash-ups. This package also includes an overview of how locomotive sound systems work. Then you'll find two step-by-step articles on installing sound decoders in diesel and steam locomotives.  Download this article collection.