It’s not a combination that’s heard often: chorus with marimba, celesta, harp, finger-snaps, handclaps, bells, gong, and other percussion. The Singers will perform works by contemporary American composers Eric William Barnum, Dominick DiOrio, Dan Forrest, Eric Whitacre, and premiering a new work by Providence Singers Assistant Conductor, Michael Galib. Leonard Bernstein’s Chichester Psalms and Charles Ives’ Psalm 90 complete the program.