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=USUAN1100349

MacLeod's description:

Genre: Soundtrack
Length: 2:58
Instruments: Synths, Acoustic Bass, Glockenspiel
Tempo: 69

Slow-moving synth textures. Glock starts at about 1:20, and the bass at 1:50 035
ISRC: US-UAN-11-00349
Dark, Eerie, Epic, Somber, Unnerving 2007