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=USUAN1100468

MacLeod's description:

Genre: Horror
Length: 1:26
Instruments: Piano, Organ, Strings, Synths

Simple motive countered by several striking dissonances. 035
ISRC: US-UAN-11-00468
Dark, Eerie, Somber, Unnerving 2008