The ghosts of Mozart, Schubert, Brahms, klezmer, ragtime, Peruvian folk music, and Hindustani singers hover over the music of John Harbison, Willlliam Albright, Gabriela Lena Frank and Reena Esmail. Music from Copland House’s featured performers are clarinetist Derek Bermel, violinists Curtis Macomber and Harumi Rhodes, violist Kathryn Lockwood, cellist Alexis Pia Gerlach, and pianist Michael Boriskin.