Program Vizio sound bar with Spectrum remote UR5U-8790L? - Time Warner TV

This question is about "Program Vizio sound bar with Spectrum remote UR5U-8790L?", with Time Warner Cable TV and apps. I would like program my Spectrum remote (UR5U-8790L) to operate the on/off and volume for the sound bar, but haven't found the code or series of codes to program it. The codes provided by Vizio don't do it, and none of the 3 methods work that are recommended by Spectrum on line. The sound bar is connected via optical cable. I do not have the ability to change the cable box to variable, nor do I have ARC on the TV (I've seen both these suggestions elsewhere). I can't get the sound bar to work with the TV with the headphone jack either, so I'm not sure about that one. The TV is a Samsung Smart TV, if that matters. The cable box is Arris/Motorola DVR DCX 3400.
Do I need a new remote? A new cable box? If so, what should I ask for?

This topic covered Program Vizio sound bar with Spectrum remote UR5U-8790L?, and TWC cable tv service.