The duo of Takács Quartet violist Richard O’Neill, praised by the New York Times for his “elegant, velvety tone,” and pianist Pauline Martin perform Schubert’s Arpeggione Sonata in A Minor, the only extant substantial composition for the now extinct arpeggione, a sort of bowed guitar. Also, Rachmaninoff’s Cello Sonata in G Minor. The evening includes a Q&A with the performers. 7:30 p.m., KCH, 415 N. Fourth Ave. Livestream also available. Tickets $29–$50 (students, $19) in advance (recommended) at kerrytownconcerthouse.com and (if available) at the door. 769–2999.