NOTE: Loading complete ESU sound and non-sound files into a locomotive requires anESU LokProgrammer. You'll also need the latest version of the LokProgrammer software available here: LokProgrammer Software. While it is easier, a LokProgrammer is NOT required for making any CV changes in your LokSound decoder. Any NMRA compliant DCC system can be used to make CV changes. CV changes can also be made with the latest version of JMRI Decoder Pro.