Sister Gertrude Morgan's music wasn't remarkable for its beauty, its message, or its sophistication. Nevertheless, through a single album -- 1970s Let's Make a Record, recorded in New Orleans -- the eccentric figure best known for roaming the streets of the French Quarter in the 1950s and '60s and shouting invented spirituals through a megaphone made musical history, and not only within the narrow confines of gospel. Better than anybody who has ever set lips to a microphone, Sister Gertrude Morgan established an aural equivalent for outsider art.
For Sister Gertrude, born in ...