According to its website, the Champlain Philharmonic’s mission is “to engage and inspire musicians and audiences with orchestra concerts and community projects that create transcendent experiences.” The ensemble, which performs regularly in Addison and Rutland counties, lives up to the challenge with its annual spring concert series. Directed by Matthew LaRocca, this year’s “Lion and Lamb” features an array of dramatic 19th-century works that classical connoisseurs may find familiar. Music lovers in Poultney and Montpelier revel in pieces by Giuseppe Verdi, Edvard Grieg, Jean Sibelius and Franz Schubert.