Sundance channel "music" ad?

[happymadison87]

Does anyone know what song is played during the "music" commercial on Sundance? It's exclusively a Sundance channel commercial, because it's for music-related documentaries they show every week. A quote from Beethoven is shown, and then they show clips of various documentaries and musicals while a song plays. There's no lyrics, but they sort of hum in parts. I don't think you can download the commerical anywhere, but they show it at least once during every airing of the Al Franken Show.