"The Heavens Laugh, the Earth Rejoices" is the title of a Bach cantata and of the Waterloo-Cedar Falls Symphony's concert of Easter-related Bach, which you can hear tonight at 7 PM. The Brandenburg Concerto no. 1 is preceded by sinfonias from several cantatas (including "The Heavens Laugh, the Earth Rejoices" BWV 31) and the Easter Oratorio, and by the entirety of the beautiful Cantata 104, "Hear, O Shepherd of Israel" (with the University of Northern Iowa Cantorei and soloists Jeffrey Brich and John Hines). Music Director Jason Weinberger conducts.