Guest conductor Sean Newhouse will direct the Illinois Philharmonic Orchestra (IPO) for its season finale April 8 featuring Tessa Lark as guest performer for Edgar Meyer’s “Violin Concerto.” The program will begin with a 6:30 p.m. pre-concert question and answer session followed by the IPO ‘s concert at 7:30 p.m. at Lincoln-Way Central’s Performing Arts Center, 1801 E. Haven in New Lenox. The concert is themed around American perspectives, and Newhouse selected the violin concerto, commissioned in 1999, because it has an Appalachian flavor and bluegrass flair. Lark, who . . .