Mei-Chun Chen is the viola soloist for the Topeka Symphony's March 18 concert. She is featured in William Walton's viola concerto, and played the first two movements of the concerto live in the KPR studio, with pianist Erik Lawrence. Michael Keelan talked with her about viola concertos, and with guest conductor Brian Stone about the rest of the program, including Stravinsky and Theofanidis.