A single lark swoops and flits, hovers and circles, all the while rising higher and higher over the English countryside. It's Ralph Vaughan Williams' much-loved work for violin and orchestra, "The Lark Ascending." We'll hear Scottish violinist Nicola Benedetti in a performance at a London Proms concert a couple of weeks ago. Then we'll be the ones doing the ascending, riding the gondola to the top of the mountain at the Aspen Music Festival. We'll hear Dvorak's Carnival Overture, from a concert last summer at Aspen.