I think it's important to note that this is article references the origin of polyphonic music, as it relates to the western church. Polyphonic music as a whole

I think it's important to note that this is article references the origin of polyphonic music, as it relates to the western church. Polyphonic music as a whole goes back much further than AD900, and even christianity itself. E.g: http://en.wikipedia.org/wiki/Music_of_Georgia_%28country%29#Traditional_vocal_polyphony http://en.wikipedia.org/wiki/Music_of_Georgia_%28country%29#...