orologio en CB01 OFFICIAL. A grand piano, wrapped in foil in an attic surrounded by mountains. The instrument is disassembled and reassembled, the interlocking of keys, hammers, and strings carefully examined and observed. Sasha Pirker portrays the work of piano tuner Stefan Knüpfer as an inexhaustible diversity of hand movements. And the precision of the preparatory work for the desired sound experience.