To launch Tucson's All Souls Procession Weekend, f amed mariachi ensemble Mariachi Los Camperos will raise the dead and celebrate life in this Tucson Symphony Orchestra special concert at Tucson Music Hall. Their sound of impressive vocals, violins and guitars steeped in rich cultural tradition will add spice to your life. Founded in 1960 by mariachi "giant" Natividad Nati Cano, Mariachi Los Camperos features musicians from both Mexico and the U.S. They collaborated on Linda Ronstadt's Canciones de Mi Padre (Songs of my Father) album. The Grammy Award-nominated ensemble has recorded nine albums, including four CDs with Smithsonian Folkways. José Luis Gome z, conductor, at Tucson Music Hall.