When I use the term proper music it's more personal. It includes some folk music and some clasical, and others as well. It's a matter iof being fitting.
If I said that a film had proper music it's mean that it had music that helped it, and that you'd want listen too even apart from the film.
The divide between classical music and other musics is a terrible shame. One of the best things that the Beatles did was to do somethinmg to break down that barrier.
Essentially I think that the best music is music that will survive being played by people who aren't too skilled, but love it. The way Carolan's music does. So does Mozart, and a range of others. And there is a whole range of highly regarded music that wouldn't pass that test, and I think is on a far lower plane by that very fact. And that is another thing I mean when I use a term like proper music.
If you can't sing to it, and yiou can't dance to it, it's just doodling. And I don't carer if it calls itself classical, or folk, or jazz or what have you. It's not proper music.