Seraphim - named for the classification of Old Testament angels who sing the praises of God - is a pair of American standard spirituals, "Ain't it a Shame" and "Jesus on the Mainline." The former channels the essence of old Sun Records 45s with the sawdust and sideshows of a state fair while the latter evokes a late-night, kerosene-lit singalong on the front porch of a shotgun shack - having enlisted vocal talents from Emily Zuzik, Earl Greyhound's Matt Whyte, Suzanne Cerreta, Michael Fortner, Sean Toussaint and Marisa Kakoulas.