This is precisely the effect of this scene, where the Shinra President watches the destruction of the Sector 7 slums. Here, he's listening to the end of a movement from the 3rd part of Haydn's Creation, "Of Stars the Fairest." You can see it in this performance from about 7:08-7:23. The singers from the game soundtrack are singing in German and the lyric is: "Ertönen sollt ihr früh und spät von unserm Lobgesang." We might say, "Singing our eternal praises to you." This is the longest movement in the Creation, a three part structure, and this is a moment from the end of the second part. In this tiny snippet, Adam and Eve describe the angel chorus singing their praises to God.
I especially like how the audio adjusts as the camera shifts from inside the room with him to the outside shot. Great audio detail and fantastic use of classical music in a video game. What's your favorite use of classical music in a game?