From Negro Spirituals:
The tunes and the beats of negro spirituals and Gospel songs are highly influenced by the music of their actual cultural environment. It means that their styles are continuously changing. The very first negro spirituals were inspired by African music even if the tunes were not far from those of hymns. Some of them, which were called “shouts” were accompanied with typical dancing including hand clapping and foot tapping.
SHOUTS
After a regular worship service, congregations used to stay for a “ring shout”. It was a survival of primitive African dance. So, educated ministers and members placed a ban on it. The men and women arranged themselves in a ring. The music started, perhaps with a Spiritual, and the ring began to move, at first slowly, then with quickening pace. The same musical phrase was repeated over and over for hours. This produced an ecstatic state. Women screamed and fell. Men, exhausted, dropped out of the ring.
Some African American religious singing at this time was referred as a “moan” (or a “groan”). Moaning (or groaning) does not imply pain. It is a kind of blissful rendition of a song, often mixed with humming and spontaneous melodic variation.
More here. (Note: In honor of Black History Month, at least one post will be devoted to its 2024 theme of “African Americans and the Arts” throughout the month of February)