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=USUAN1100752

MacLeod's description:

Genre: Soundtrack
Length: 2:41
Instruments: Music Box, Choir
Tempo: 118

The child-like music box is the constant in this piece, but the repetition of the melody shifts from innocence to the music of a character detached from life, on the verge of psychoses or paranoia. The choir in the background lends the music a heavenly, albeit sepulchral feel. 036
ISRC: US-UAN-11-00752
Calming, Unnerving 2010