April 1962 and April 1963, a year apart, Berlin acousticians, among the most experienced in the world, adjusted the removable panels of the walls of studio No. 3 of the Berlin Radio House. A technical marvel based on revolutionary, though totally traditional methods, this hall was designed in 1929 by Hans Poelzig with a reverberation that can be modulated at will. Henryk Szeryng has the reputation of a scrupulous, uncompromising and authentic master who ranks alongside a Milstein or a Grumiaux. In April 1963, he was 44 years old. At the peak of his art, he meticulously took out of his box his Guarnerius del Gesu, known as "the Duke", with which he would make violin history that day.
