In his first concerts of the regular season, the NSO's new director Christoph Eschenbach conducts Beethoven's Symphony No. 9, one of classical music's most-heralded compositions. Joining Eschenbach and the NSO is soprano Marisol Montalvo, mezzo-soprano Yvonne Naef, tenor Nikolai Schukoff, bass-baritone John Relyea and the Choral Arts Society of Washington. Friday, Oct. 1, and Saturday, Oct. 2, at 8 p.m. Kennedy Center Concert Hall. Tickets are $20 to $85. Call 202-467-4600 or visit kennedy-center.org.