What's the song that plays in FMA:Brotherhood episode 36 at 4:40? There's a song in episode 36 of Full Metal Alchemist: Brotherhood at 4:40, and it plays many times afterward in that episode.

I listened to almost all of the soundtracks and could not find it.

What is this song?
I believe you are looking for track 18, No Answer, from the Fullmetal Alchemist Brotherhood Original Soundtrack 2.