Cellist Alisa Weilerstein

Opera Lafayette has now proved that if you program interesting music, rather than the same dull chestnuts, perform it well, and offer it at ticket prices that are not prohibitively expensive, people will come. Witness their performance of Gluck’s Armide on Monday (February 1, 7 p.m.) in the Kennedy Center Concert Hall. To honor their 15th anniversary, the group sold all 2,100 seats in that vast venue, far larger than where they usually perform, at the price of $15. If you have not already purchased your ticket, call the box office to inquire about last-minute cancellations.

>> Austrian pianist Till Fellner is nearing the conclusion of his technically polished execution of the complete cycle of Beethoven’s piano sonatas. He will perform the fifth of these concerts next Sunday (February 7, 6:30 p.m.) on the free series at the National Gallery of Art. Show up early if you want a seat.

>> One of the big composer anniversaries being celebrated this year is the 200th birthday of Robert Schumann. The Castle Trio and Friends offer an all-Schumann concert (February 7, 7:30 p.m.) for the Smithsonian Chamber Music Society, at the National Museum of American History.

>> The Capuçon-Angelich Trio is in town this week, giving concerts at Dumbarton Oaks (February 1, 8 p.m.) and at La Maison Française (February 2, 7:30 p.m.). Haydn, Shostakovich, and Brahms figure on the program.

>> Cellist Alisa Weilerstein was one of the performers invited recently by the Obamas to perform at the White House. She returns to Washington, with pianist Inon Barnatan, to give a recital at the 6th & I Historic Synagogue on Saturday (February 6, 8 p.m.).

>> The Quatuor Ébène regrettably had to cancel their concert in the Beethoven string quartet cycle hosted by the Candlelight Concert Society. Their replacements, the Leipzig Quartet, are just as worth hearing, however, and they will be at Howard Community College’s Smith Theater in Columbia, Md., on Saturday night (February 6, 8 p.m.).