PELLA — The Central College A Cappella Choir, under the direction of Mark Babcock, will perform a post-tour concert at Second Reformed Church, 612 Broadway St. in Pella, on Sunday, April 17, at 4 p.m. Davis Folkerts, professor emeritus of music, will accompany on piano and organ. The choir will sing their repertoire from their spring break tour. The concert is free and open to the public.