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=USUAN1100783

MacLeod's description:

Genre: Soundtrack
Length: 3:59
Instruments: Harp, Celesta, Cellos, Basses
Tempo: 128

A childlike celeste plays high notes among a barely audible harp and deep bass. In the second minute the disturbing melody is in a lower register, and strings accentuate the discordant sounds before returning to the high register. The music is excellent for a creepy dream sequence or the exposition of an unknown fantasy world.
This track is available in many lengths.
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ISRC: US-UAN-11-00783
Dark, Eerie, Unnerving 2011