The two have been recording and performing together in the classical repertoire for almost a decade, and have become equally at home thumbing through the pages of the Great American Songbook. On this week's Song Travels, Bell and Denk perform selections from their latest project, French Impressions, an album of works by César Franck, Maurice Ravél and Camille Saint-Saëns. Through conversation and music, Feinstein and his guests connect the dots between classical music and standards.