[jrs235]

We performed a piece with these overtones in highschool in 1999. Piece is called Past Life Melodies. St. Olaf Choir perfromed it in 1997: https://music.apple.com/de/album/advance-australia-fair/1567...

Edit: The overtones come later in the piece during solo parts. What you hear early on in the piece are not overtones.

[jrs235]

Here's the full song for free on youtube: https://www.youtube.com/watch?v=Jgv6WdhbP74

Overtones begin around 4:50