Thanks Pete, I have been looking at the info supplied. I'm not so prideful to admit I am lost! And l don't want to be. I think the thing I am failing to understand is how do I program one of 2 decoders when they are hard wired together? With decoder pro, I am reading CV1 = 45 CV17 = 208 CV18 = 255 ( which also are the same values from the calculator ) CV29 = 45 Basic tab shows long address is 4351 and primary is 45 / extended = 4351 If I go to my NCE procab, the only response comes from loc:4351 with control of lights, speed, direction and sound functions on the main. I have learned ( with much help from the JMRI group ) to program lights/direction/ on the NCE decoder part of this with decoder pro. . I do not have any control of sound items like master volume or able to change horn, etc. The sound tabs are blank. I sense I am close to a light bulb moment. Please bear with me. Many thanks, Bruce in Mount Airy, MD