Illness has forced a change in the musical program planned Sunday at the Westport Library.

The folk-music group, Gwynfyd, which had been scheduled to perform, will be replaced by the Axis Duo. The classical conert is set for 2 p.m.

The duo's performers are Maria Conti on violin and Jorge Caballero on classical guitar. The program is free and open to the public. It will take place in the library's McManus Room.

Conti's musical career is both as a soloist and as a chamber musician, having performed at Carnegie Hall, Avery Fisher Hall, Alice Tully Hall, Merkin Concert Hall and Weill Recital Hall in New York City, as well as Venezuela with the Manhattan Symphony Orchestra. Caballero, the youngest musician and the only guitarist to win the prestigious Naumburg International Competition, is known for his virtuosity and spellbinding performances.

For more information, call 203.291.4800 or visit the library's web site westportlibrary.org.