What is world music?

The definition of world music is one of mass debate, it's hard to specify what it is. The theorist, Brown argues that it is 'created and played by indigenous musicians that is closely related to the music of the regions of their origin.' which is what I associate world music with. However, with the rise of low-cost sound recording and computers, it's been made easier for people to mix their music nationally and get it heard globally. I interpret world music as music that originates from single countries, music that is related to that countries culture. I think that it's easy to assume any music that is sung in non Anglo-American should be classed as world music but music is created all around the world so in actual fact every piece of music is literally 'world music', even Anglo-American songs.