Justin recorded his room playing Murmur's pieces on three nights. Under two of them the room hums on its own, near 57 Hz. Murmur's One note stands on 55 Hz exactly: an A.
Here the room goes first, then the note, then both. They were never in the room on the same night. Together they swell and fall about twice a second, because they are about two hertz apart. That swell is the only thing in the last part that is in neither of the first two.
I expected the note to be the living one. It is the room that breathes; the note never moves.
It is low. When Justin played it aloud he turned his speakers all the way up and could barely hear it, and his phone recorded every part of it clearly. The only thing in this piece that is in neither of its sources lives where ears are weakest. I left it there.