The string duo and multimedia performance outfit Chargaux (a portmanteau of its players, Charly and Margaux) performs music at artist Heather Hart’s Oracle of Lacuna installation at the Storm King Art Center. Chargaux will play between 3 and 5 p.m. on Saturday, May 20. The duo has contributed string arrangements and performances to recordings by Kendrick Lamar, J. Cole, jazz great Robert Glasper and others. For more information, visit http://stormking.org. The Storm King Art Center is located at 1 Museum Road in New Windsor.