You’ve heard the idiom “There are two sides to every story.” When Christopher Brellochs unearthed an early version of iconic American composer Aaron Copland’s orchestral ode to New York City, a new adage was born: “There are two soundtracks to every city.” Copland’s original composition was intended to accompany playwright Irwin Shaw’s production of the same name. The play explored a New Yorker’s descent into madness, and it flopped. But this haunting work’s rediscovery led to renewed interest. Burque residents can experience it thanks to Chatter on Sunday, March 30, at theKosmos (1715 Fifth Street NW). Copland’s “Quiet City” and “Clarinet Sonata” and Anton Webern’s “Quartet for Violin, Sax, Clarinet, Piano” come into being courtesy of James T. Shields (clarinet), Tzufeng Liu (piano), David Felberg (violin), Patrick Posey (saxophone) and John Marchiando (trumpet). Hakim Bellamy contributes poetics. The concert begins at 10:30am, but arrive early for espresso and tickets, which range from $9 to $15 for adults, $5 for kids.