Guild Wars 2

Is there any chance the devs can give us information on how to make our custom tracks play specific music in specific areas? or at least tell us if it is impossible to give us such feature?

Example: City track plays in all 5 major cities, ambient works for all areas of Tyria and expansion area.
While if you run it without custom playlists, the cities have their own specific track, along with maguuma having different ambient then the rest of tyria.

This would be cool. I do enjoy the music in GW2, but the same song over and over and over can get extremely annoying.