On Maurice Ravel’s birthday, enjoy two of his less-performed works: the Sonata for Violin and Cello, an exercise in austerity for a composer more often associated with luxuriousness; and the cantata “Alyssa,” based on a Celtic legend, Ravel’s third attempt to win the coveted Prix de Rome. His hopes were quashed by a conservative faction at the Paris Conservatory. Ultimately, he would have the last laugh. He’s now celebrated as one of the great composers. All’s Ravel that ends well, this Sunday at 10 pm.