Hi, I want to use an Arduino to automate my HO trains (and, maybe even, ultimately, a Raspberry PI/Arduino arrangement that would allow me to also create a Website with an interactive interface).  I haven't found a Bachmann DCC controller that is "Open Source" enough for me to do this (at least not one that is within my price range).  I'm an Electrical Engineer and have already programmed an Arduino to produce basic DCC packets. I've also designed a booster.  I did this all in anticipation of the arrival of my new Bachmann "HO ALCO 2-6-0 Steam Locomotive" with "DCC Sound Value On Board" (my first of hopefully several).  I was hoping a DDC command specification would be included, but instead, all I can find are "CV" designations.  Is there a way to relate these CV values to actual DCC packet fields?