Jake Heggie, composer of many contemporary operas and more than 300 songs as well as chamber, choral and orchestral works; will speak at Grace Cathedral on Sunday, May 5, about music including his newest work, “If I Were You” (music by Jake Heggie, libretto by Gene Scheer). The plot is based on the Faustian story by Julien Green, for the Merola Opera Program’s 2019 season (world premiere, August 1, 3, 4 and 6 at the Herbst Theatre).