Renowned contemporary American composer Tobias Picker will narrate the West Coast premiere of his “The Encantadas,” a narrative with music inspired by Herman Melville’s novella of the same name, to open Jacaranda’s 2012-13 season. The Oct. 20 concert, dubbed “Different Islands,” will juxtapose Picker’s evocation of the unspoiled Galapagos Islands with Steve Reich’s “City Life,” ...