The first book of the Well-Tempered Clavier, by J. S. Bach.
http://www.youtube.com/watch?v=8Ks9Q8AF4Do
As interpreted by pianist Maurizio Pollini.
Glenn Gould would no doubt have spat out his milk and arrowroot biscuits in distaste at being made to listen to this particular recording, but for those with a broader aesthetic taste there is much to admire here.
Semi-Partisan Politics 