Simulates the unique prototypical operation of the multiple prime movers used in National Railway Equipment (NRE) GenSet Locomotives. It includes sound files of the Cummins QSK19C prime movers recorded by SoundTraxx engineers directly from an NRE 3GS-21B Locomotive. With separate sound channels for each of the three Cummins QSK19C prime movers, this decoder accurately replicates the powering up and down of each engine through throttle notches. Each engine also has its own volume control, and the decoder is also equipped with a master exhaust volume control.