In any city, in any country, go to any mental institution or halfway house you can get yourself to. When you reach the front desk, ask to visit someone who calls herself "The Holder of Song.

As you open the door, a sudden wave of heat will pour out from the hallway beyond it, and wash over you. Proceed down the hallway. As you walk, the air around you will grow increasingly frigid

That is Object 6 of 538. When its song plays again, they will all come together.