Happy birthday, Vladimir Horowitz

It is the birthday of pianist Vladimir Horowitz (1903), who is regarded as one of the greatest pianists of the 20th century. Horowitz began performing in 1925. His career spanned 50 years. His repertorie included works of the greatest composers, among them Beethoven, Chopin, Liszt, Mozart, Prokofiev, Rachmaninoff, Schumann, and Tchaikovsky. Here is Chopin's Black Key Étude, so called because the right hand plays exclusively on the black keys.