Singer and guitarist Marty O'Reilly plays a mix of Delta blues, American folk and gospel music. His new album, "Pray for Rain," finds O'Reilly and his group The Old Soul Orchestra — Jeff Kissel on double bass and Chris Lynch on fiddle — stacking their musical abilities on top of a blues foundation. Covers and originals range from soft ("Cambium") to heavy-hitting ("Smokestack Lightning"). Marty O'Reilly & The Old Soul Orchestra will play at 9 p.m. Friday, March 28, at Caldera Tap House, 31 Water St. The cover costs $5.