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=USUAN1100506

MacLeod's description:

Genre: Unclassifiable
Length: 2:06
Instruments: Piano, Cello,

Interesting piano and cello piece. As title suggests, there is some questionable tuning. Piece begins with piano, brings in cello around 00:05, both continue until the end of the piece. 021
ISRC: US-UAN-11-00506
Bouncy, Grooving, Somber 2008