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=USUAN1100466

MacLeod's description:

Genre: World
Length: 4:24
Instruments: Alto Flute, Bass Flute, Synths, Percussion

Very very slow piece featuring the alto flute. 030
ISRC: US-UAN-11-00466
Dark, Mysterious, Mystical, Somber 2008