Pacific Musical Society annual fund-raising gala on Dec. 2, in the Westin St. Francis Hotel, will honor composer Jake Heggie. The 102-year-old Society's gala will present a program of Heggie songs performed by Frederica von Stade and Nicolle Foland, with Heggie at the piano. Arias and duets by Dvořák, Mozart, and Offenbach follow.