"Gieseking played all of the German composers and went as far afield as the Rachmaninoff concertos. He was one of the few international favorites who interested himself in contemporary music, [...] But his greatest fame came as an interpreter of Debussy and Ravel. In his prime (about 1920 to 1939; after the war he sounded almost like a different pianist) there was no subtler colorist. His knowledge of pedal technique was supreme, and in particular he was a master of half-pedal effects. Never did he create an ugly sound. The sheer limpidity and transparency of his playing would alone have been memorable even if it had not been backed up by a fine musical mind."
January 1, 1970
https://en.wikiquote.org/wiki/Walter_Gieseking