How do I program into my remote an external audio device that's not listed by brand n

#1
I have a Polk audio soundbar model SB1BLA that isn't listed in DirectTV when trying to program the remote by brand and name. I later was given a list of 4 codes that come up specifically for this device and model from an ATT Administrator on the online forum. However, now I need to find out how to program in one of these codes with the remote so that it will work the Polk device. I seem to only find the remote setup menu only allows you to choose preselected brand names and models. Thanks for your help.

This question, "How do I program into my remote an external audio device that's not listed by brand name and model?," is about DirecTV channels, programming, equipment, and sports.
 
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