I'm not sure what the actual name of it is, but here is a link to what it sounds like. It's just so beautiful and I would love to have a rip of the song, preferably of great quality. I have the main song that normally plays on the menu, but this beginning part has some kind of bowed electric guitar sound to it, and it just sounds amazing.

https://www.youtube.com/watch?v=V__uTHmhW_E