Today it's Antonio Vivaldi's birthday. And so to celebrate, a musical treat. Not so well known as "The Four Seasons" or his "Gloria", this is his "Concerto a due cori con violino discordato" (RV 583) and it is sublime. If you are stretched for time, go the 5:20 mark and just listen to the Andante. Turn it up and have tissues ready...it includes a minute of possibly the most beautiful music ever composed. You will know when you get to the right spot.