Watch the Efficiency of a Mozart Composition That Had Been Misplaced for Centuries

For many musi­cians, a long-lost track writ­ten of their teenage years could be of inter­est solely to seri­ous followers — and even then, prob­a­bly extra for bio­graph­i­cal rea­sons than as a stand­alone piece of labor. However that’s laborious­ly the case for Wolf­gang Amadeus Mozart, who was com­pos­ing superior music on the age of 5, and…