Tonight, (Sept. 17th) Justin Brown begins his fifth season as music director of the Alabama Symphony Orchestra. The 2010-2011 season includes Brown performing as a solo pianist. It also includes a world premier by a composer-in-residence, as well as a performance of all nine Beethoven symphonies over the course of two weeks. Justin Brown spoke with WBHM’s Michael Krall about the season and the opening work on this weekend’s concert, the Brahms Concerto for Violin and Cello…