Jonathan Powell talks to Arnt Cobbers in his podast series for the German Crescendo magazine (in English) about Hans Winterberg, whose first piano concerto he has just recorded for the first time, his composition lessons with Alexander Goehr, what interests him in Russian rarities of the early 20th century, why Kaikhosru Sorabji wrote pieces for piano solo of five, six or eight hours – and how to survive their performances as a pianist.