That's rather creepy being as I live near Chicago and have family and friends near downtown. The only thing that strikes me as odd about the
author's "translation" of the subliminal message/noise is in regards to the "south, east, evacuate" bit. Directly east of downtown is Lake
Michigan. There is technically no "east" immediately of downtown. What Chicagoans consider the east side is more southeast, closer to Indiana. If
someone wanted to put a hurt on Chicago, the south and east sides seem an odd choice...
All creepiness aside, the "noise" files would actually be kinda catchy if you added some music to them