Wolfgang Amadeus Mozart

Wolfgang Amadeus Mozart
Piano

Even in the sixth year of his age he would play the most difficult pieces for the pianoforte, of his own invention. He skimmed the octave which his short little fingers could not span, at fascinating speed and with wonderful accuracy. One had only to give him the first subject which came to mind for a fugue or an invention: he would develop it with strange variations and constantly changing passages as long as one wished; he would improvise fugally on a subject for hours, and this fantasia-playing was his greatest passion

Salzburg
the memoirs of Placidus Scharl
Benedictine priest Placidus Scharl
Year of source: 1808
original memoirs not online?