Music from the "Time-lapse Trailer"

[Reportin']

Which of the various .ogg files in the game's \redist\music directory contains the music track heard during the first part of the "Time-lapse Trailer" ? I want to listen to it outside of the game and without loading up Youtube.

Oh, and by the way :
Thank you, everyone at Frictional Games! Thank you for an extraordinary gaming experience!
No other horror-themed game has been able to "touch" me quite like this since I was playing Realms of the Haunting back when I was a kid.