I have a vague recollection of reading of field work, which included recordings of voodoo ceremonies, some of which were issued in very limited edition 78's.  I think there were print publication planned.  Perhaps work by Harry Middleton Hyatt, but wouldn't swear to it.
Thomas Stern.

David Katznelson wrote:

I have heard that in the early part of the 20th century, there were recordings of Haitian Hoodoo conjuring chants that were recorded. Does anyone know about these by any chance?  Were some done in New Orleans?