I was just reading this thread and it was mentioned that you can't adjust cvs with ez command seeing as i'm new at this  I was thinking of using ez command, is this a good thing or a bad thing?

Hello everyone,
   I'm new to railroading and wanting to use dcc.I just bought a bachmann dcc equipped gp35 and am wanting to add sound,is this a hard thing to do and what decoder does anyone recommend?
                      thanks for any help
                                       Eric Spencer

I am new to forums so please bear with me.I am looking to add sound to a dcc equipped engine item#60605 HO GE70 ton diesel. I am also new to trains,Need to know if it can be done and if so how hard it is and also what decoder to use. Thanks