Thanks Jonathan, I will give that a try. Where can I get a DCC system unit  that can change the decoder. 

Thanks for the info. How do I reset the decoder to o3? I tried using the method used to reset the decoder but no luck. I will try again. I may have done something wrong.
Thanks Again for the help

Hi, I recently was given a Bachmann southern 722 green spectrum. I am trying to find out if it is dcc on board or dcc ready. It runs great if I set it up on 10 on my dcc controller , but will not respond to any other number. Light comes on. I hate to tear into it without knowing more about it. If it is dcc ready, what do I need to update it to dcc with sound? I am new at this so don't be to hard om me.
Thanks for any info.