The final chapter of the Las Américas Festival is a smorgasbord of sounds and styles. Two of legendary composer-conductor Leonard Bernstein’s masterpieces are presented: his symphonic suite from the Oscar-winning film On the Waterfront and his Chichester Psalms, featuring the San Antonio Symphony Mastersingers. Tango-king Astor Piazzolla’s concerto for bandoneón, Aconcagua and Arturo Márquez’s Danzón No. 2 add Latin zest to the proceedings.