Hear Beethoven as audiences of his day would have when the Orchestre Révolutionnaire et Romantique—using valve-less brass, gut strings, and other period instruments—perform two symphonies. The Symphony No. 2 honored the style codified by Haydn and Mozart, but its boisterous humor and energy are undeniably Beethoven. With the “Eroica,” Beethoven revolutionized the symphony by creating an epic, muscular work that thrills with its swashbuckling depiction of heroism and opens the door to a new symphonic era.