Itunes library and apple TV
Why is my music library on my AppleTV different from that on my Mac, Iphone and Ipad? Where does this library actually come from as a lot of songs are missing. I have read many articles with regard to Apple Music subscriptions but I do not wish to do that. I am unable to upgrade to Catalina on Mac as I still need to access the Microsoft Office versions that I have which become incompatible.
thanks
Apple TV HD, tvOS 13