New Set - Empire Builder 4-8-4

[DMJ-Oregon]

Hello - new to training!  Just received an Empire Builder set.  I have ordered via Amazon an additional loco (4-8-2 Light Mountain DCC Sound Value) along w/some additional track, a couple of other railcars, etc. for my layout.  Have I missed something?  I plan to swap locos from time to time - space limited.  Do I need and special controller for my new "sound" loco?