Songwriters/performers/activists Matt Gould and Griffin Matthews are one of musical theater’s most closely watched creative teams. Their award-winning documentary musical, Witness Uganda (a.k.a. Invisible Thread), started life as a 20-minute benefit show for the pair’s Uganda Project charity before being transformed into a full-length musical directed by Tony winner Diane Paulus. With high-energy, power pop melodies in the vein of Rent and Spring Awakening, infectious African rhythms, and an uplifting tale about the complexity of cultural connection, the show released “gale-force waves of faith, hope and love” (Time Out New York). Tonight, the pair come together for an evening of music and storytelling made with plenty of heart and soul.