What is art? What is music?

We as humans live in a tangible, solid, very real world. But we also have the ability of abstract thoughts, and can think up ideas and ideals that have no real physical representation like the idea of "freedom" or mathematic formulas.
Now the problem is. Most people have not a very true, real connection to these ideals, even if they understand them and use them. They might know that 4/4=1 is correct. They might understand it. But they don't see the infinity beauty in it, the glamour, the splendor, the wonder, the amazement of this mathematic statement.
This is where art and music comes in. Techno has a 4/4 beat, and when listening to this beat they can feel some of the power and wonder that the to them otherwise banal statement 4/4=1 incorporates.
Art, music, books, movies essentially form an intermediary realm between the real world and abstract thinking, ideas and ideal. It makes ideals accessible to people. Take the ideal of "freedom". It was an ideal that inflamed millions, but to the normal westerner these days it often doesn't hold much glamour anymore. They don't fight for a revolution or other forms of large scale freedom anymore. But when they see a movie about a man or woman with a rebel spirit, a road movie for example, they can sense some of the power and magic the ideal "freedom" does possess.
Art and forms of art are something that is physical and can be touched, seen, recorded or listened, but at the same time it is rooted in the abstract and purely intellectual. It builds a bridge between these two things.
In a sense it is even preferable to purely ideal and abstract thinking; as it gives shape and forms to ideals and abstraction. But the ideal roots must not be forgotten.
More and more people are aware of this intermediary nature of art, as they try with cosplay, fan fiction, millions of other fan activities, movie binging, or creating art themselves, to put their "everyday life" closer to the world of art. And art is really in a world of its own.