Music Leonard Bernstein’s spectacular Mass, for singers, players and dancers, requires a marching band, rock band, chamber orchestra, three choirs, dance troupe and 12 actors. This Indianapolis Arts Chorale program is yet another gutsy undertaking for artistic director Chris Ludwa. “It’s fun, it’s brilliant, universally appealing and hasn’t been done in Indianapolis for over 20 years,” enthuses Ludwa, adding, “People in this cast were in the Butler sell-out production in the late 1970s when Bernstein was in the audience.” Originally composed for the 1971 opening of the Kennedy Center for the Performing Arts, Bernstein scored the chamber version of his “Theatre Piece” in 1972. The eclectic Bernstein, perhaps best known for West Side Story and adventurous, accessible young people’s concerts, composed ballets, film scores, choral and orchestral works and Broadway musicals while conducting worldwide. Friends claimed Bernstein was “doomed for success.” A critic commented he was “a victim of his own versatility, gifted in so many fields, he opened the door to a new musical theater and then, rather than walking through, he chose to go elsewhere.” Mass became “widely-discussed.” Ludwa claims it’s significant now. “We as a society have come almost full circle since 1971. The piece is so timely given the climate of the world. It transcends cultural, religious, theological borders.” Performances are May 7-8, 7:30 p.m. at St. Luke’s United Methodist Church, 100 W. 86th St. For tickets call 846-3404.