Source.

The human voice is the most remarkable instrument. Thinking of the diverse ways it’s used around the world (note the fine survey on the CD-set Les Voix du monde), an astounding vocalist is Bobby McFerrin (b.1950) (website; wiki; YouTube channel).

Here’s his solo album The voice (1984):

Besides his Don’t worry, be happy (1988), note also his Circlesongs project.

Here’s a clip from Bach and friends:

And here he is in concert with Chick Corea:

Among many related posts, see my Playlist of songs, A cappella singing, Strings and voices, Flamenco, Meredith Monk, Two guttural vocalists, Nina Hagen, Barbara Hannigan, and Counter-tenors.