Music by Kevin MacLeod. Available under the Creative Commons Attribution 3.0 Unported license. Download link: https://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100406

MacLeod's description:

Genre: Soundtrack
Length: 0:38
Instruments: Choir, Marimba, Percussion, Brass, Strings
Tempo: 125

Starts quiet, ends fortissimo brass. 035
ISRC: US-UAN-11-00406
Dark, Eerie, Epic, Intense, Unnerving 2008