Music by Kevin MacLeod. Released into the public domain (CC Zero). Download link: http://freepd.com/Cinematic/The%20Endless

MacLeod's description:

Genre: Classical
Length: 3:30
Instruments: Strings

Intense and troubling, the strings pull from the bass, creating a full and heavy sound. Meandering between staccato pulses and arduous pulls of the bow, the music is in a dramatic minor key with major chords interspersed throughout. Pauses of silence leave the piece unsettled and without resolve. 044
ISRC: US-UAN-11-00761
Epic, Somber 2010