After 1945 Otto Klemperer no longer regularly conducted in Berlin. These live and studio recordings with the RIAS Symphony Orchestra Berlin (later known as the Radio Symphony Orchestra Berlin), made between 1950 and 1958, are important documents of the rebuilding of German culture after the war. These recordings illuminate Klemperer's late performing style, his repertoire, and his interpretational ideals. He explored the repertoire of the eighteenth to the twentieth centuries by creating three-dimensional sound, concise rhythms, clearly contoured forms and precise characterisations. He interpreted the works of Mozart and Beethoven through Mahler and Hindemith he forged a connection to the music which had been banned by the Nazis. With this new 5-CD boxed set, audite documents the artistic cooperation between Klemperer and the RSO Berlin, and was able, for the first time, to utilise the original tapes from the RIAS (today's Deutschlandradio Kultur) sound archives, thus also ensuring the best possible technical quality. This release is furnished with a producer's comment by Ludger Böckenhoff.This release forms part of our series Legendary Recordings and bears the stamp "1st Master Release". The term stands for the exceptional quality of audite's archive releases which are all, without exception, produced using original tapes from the radio archives. Usually, these are the original analogue tapes with tape speeds of up to 76 cm/s, which are of astonishingly high quality, even by today's standards. In addition, the process of re-mastering - executed with professional expertise and sensitivity - reveals hitherto hidden details of the interpretations, creating a sonic image of superior quality. CD releases produced from private recordings of radio broadcasts or old 78rpm records cannot match this level of sound quality.