This spring, one of the best-preserved Strads in existence will go up for auction at Sotheby’s. Built some time between 1700 and 1720, during the very best period of Stradivari’s work, the viola is a real rarity, one of only ten in existence. Maybe that justifies the starting price of $45 million. What does that prized strad actually sound like, you might wonder? Filmed by The New York Times, the clip above features David Aaron Carpenter (called "The Hottest Violist of the 21st Century") playing Suite No. 3 in C by Johann Sebastian Bach. If you're a viola aficionado, we would be curious to get your take on what you hear.