"The Creator makes but one demand
Peace and happiness through all the lands..."
The social and political upheavals of the 1960s have been cited as a major factor in the emergence of a new stylistic trend in jazz, with a very different emphasis to the forms of the music which emerged earlier. Many of the artists involved in the making of this new music, variously called "free jazz", "the new thing", or "energy music", recorded for the Impulse! label. Ashley Kahn writes that several musicians, often those who had either played with or been influenced by John Coltrane, such as his widow Alice Coltrane, Archie Shepp, Pharoah Sanders, and Leon Thomas, began exploring new thematic and musical ideas, often associated with non-western religious and musical traditions.
https://en.wikipedia.org/wiki/Karma_(Pharoah_Sanders_album)
According to Ben Ratliff of The New York Times, Thomas had begun his career "as a straight blues-jazz singer" with a "stout tenor voice", but by the mid-1960s, he "had begun to spend time with young jazz musicians who were looking to Africa, the East and meditation for musical material … Thomas developed his ululating singing style, which has been compared to African pygmy and American Indian singing techniques and which he later called 'soularphone.' He believed that his ancestors had given him his elastic throat articulation, he said, and henceforth always used it.
https://en.wikipedia.org/wiki/Leon_Thomas
track link: https://www.youtube.com/watch?v=3ixv0kX3niA