Film critic and director François Truffaut wrote that "Before "Kane", nobody in Hollywood knew how to set music properly in movies. "Kane" was the first, in fact the only, great film that uses radio techniques. ... A lot of filmmakers know enough to follow Auguste Renoir's advice to fill the eyes with images at all costs, but only Orson Welles understood that the sound track had to be filled in the same way." Cedric Belfrage of "The Clipper" wrote "of all of the delectable flavours that linger on the palate after seeing "Kane", the use of sound is the strongest."