The original that we had ca. 1950 was a 78 RPM record with "Grandma's Lye Soap" on one side and "It's In the Book" on the other, with both delivered as the "Rants" of a tent revivalist.

For an "authentic" performance of "Lye Soap," in the style of that version, the lead must alternate randomly between screaming and mubling unintelligibly, and you should have several "backups" to interject random "Amen" and "Hallelujah" comments. One "distinctive" backup voice might be consistently where a spontaneous outburst might be appropriate in the context, to suggest that not all the congregations was drunk (revivalists of the time called it being enraptured) but the majority should be random = with a few outbursts at "obviously inappropriate" times.

The lead voice "minister" made several "interjections" during Lye Soap as though leading a group sing and I don't believe I've seen these in printed lyrics. A couple were "C'mon Now, Let's Hear It" and "Sing It Up Now," "Sing Out," and "Let's All Sing Out Now."

"It's in the Book" was delivered as a "sermon" with less need for backup "singers."

John