SUZZY and Maggie Roche didn’t write the lyrics to their latest album, “Zero Church,” while strumming on the guitar or sitting in front of the piano.

Instead, Suzzy interviewed people from all walks of life -a liberated Sudanese slave, a woman with AIDS, Vietnam veterans. From these conversations, she collected poems, prayers and hymns, which she and Maggie then set to music.

The resulting spiritual album includes songs such as “This Gospel How Precious,” a Shaker hymn, and “A Prayer,” by a Vietnam vet – a moving elegy from a man who talks about killing during the war and asks for forgiveness.

Suzzy and Maggie, who perform with their sister Terre as the Roches, will take the stage at St. Ann’s Warehouse, performing at the Brooklyn venue tonight through Sunday.

St. Ann’s Warehouse: 38 Water St., Brooklyn, (718) 858-2424. Tickets are $25.