Arcadia Public Library concerts, called “A Classical Kaleidoscope” offer an unusually brilliant piece of programming by coordinator Paul Stein. On Wednesday, Jan. 20, Stein, a violinist has invited violinist Lorenz Gamma, Aaron Oltman, viola, Maksim Velichkin, cello and Ming Tsu, piano to join him to perform Shostakovich’s Piano Quintet. Shostakovich composed this piece just months before the German invasion of Russia during World War II. The music speaks volumes about the impending war and provides an interesting background to studies of history of the period. All concerts are held in the Cay Mortenson Auditorium. The final concert in this series is April 28. Admission is free.