Six a cappella groups will perform Saturday, Nov. 3, at the 14th annual Battle of the Blends fundraiser for the Maine Music Society. Taking the stage will be Downtown Crossing, above, the Boston Jazz Voices, Fretless, The Maine Steiners, The Royal River Chorus and Undertone. The concert will begin at 7:30 p.m. at the Franco-American Heritage Center, 46 Cedar St., Lewiston. Tickets, $20, are available through L/A Arts at 782-7228. For more information, call 782-1403, or log on to www.mainemusicsociety.org.