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=USUAN1100642

MacLeod's description:

Genre: Unclassifiable
Length: 2:03
Instruments: Percussion
Tempo: 78

Metallic and generally unpleasant... yet I like this piece quite a bit. It gives the impression of a giant mechanical automaton.
ISRC: US-UAN-11-00642
Dark, Eerie, Mysterious, Mystical 2009