This year's “Soup and Sound” Advent Concert Series at Emmanuel Episcopal Church (4400 SE 86th Ave. Mercer Island) features music for organ solo, duo and trio.  Susanna Valleau will kick off the series on December 1 with a program of solo organ music.  Wyatt Smith and Sam Libra follow up on December 8 with organ duos, and the series ends with organ trios with Susan Bloomfield, organ, Carson Farley, cello, and Ian McKnight, flute. Started in 2014, The "Soup &…