Beethoven’s Symphony No. 2 stands out for its upbeat enthusiasm, a quality it offers in abundance despite the composer’s advancing deafness when he wrote it. Brimming with extremes and surprises, the piece exhibits an exuberance and cheerfulness not heard again until—perhaps—his Ode to Joy in the ninth symphony. The concert opens with Wagner’s Siegfried Idyll, a piece he wrote for his wife, Cosima. Wagner hired a small group of musicians to play the piece in the front hallway of his house to awaken her on her birthday morning.