The pieces were performed by musician Florian Birsak on a piano belonging to Mozart.
The original scores were found unsigned and hastily scrawled by Mozart’s father, Leopold, in a notebook belonging Mozart’s sister. The notebook, called “Nannerl’s Music Book,” belongs to the Library of International Mozarteum Foundation in Salzburg Germany. The pieces were considered anonymous until Dr. Ulrich Leisinger, Director of the Research Department, analyzed them and concluded that they are almost certainly compositions by Mozart.
The music is technically difficult, and the scores contain mistakes that a musician of Leopold’s experience would not have made, according to Leisinger.
Leisinger believes that Leopold transcribed his son’s compositions because the 7- or 8-year-old Mozart was too young.
In 1792, Johann Andreas Schachtner, a trumpet player in the Salzburg Court and close friend of Mozart’s family, reported that young Mozart showed interest in composing long before he wrote his first Concerto in 1773.
One piece, is a 35-measure piano piece in G, the other, lasting five minutes, is the first movement of a concerto in G for piano and orchestra. The Mozart Foundation plans to perform an arrangement of the piece by Robert D. Levin, pianist and Harvard professor in January 2010.
All information cited from a press release by the International Mozart Foundation. For more information visit:
http://www.mozarteum.at/default.asp?SID=38336381122936&deflng=en