I believe at the Getaway there was for sale a CD of Shape Note singing done by Washington Folks. (Some one can give you more specifics.) There are lots of recordings around, mostly sold where there's a convention or big supply of music.

Gotta tell ya, if I had to pick the perfect background music for housecleaning with fervor and inspiration, I would go for Sacred Harp. It blows all resentments right through the vacuum tube.