How do you tell a Bösendorfer from a Beckstein? We don't know but we know a man who does: piano tuner André Oorebeek, whose entire stock-in-trade is lightness. Usually working behind the scenes, Oorebeek steps briefly into the spotlight for Doors 6, illuminating a profession based on the most delicate kind of sense-and-respond. "Lightness of touch, the purity of beautiful tuning, the art of voicing and the making of tone, " will be the central themes he addresses, as he prepares the piano for a recital by Ivo Janssen. A graduate of Amsterdam's Pianovakschool (academy for piano technicians), he has completed further studies in Vienna, Japan and Germany. In an active and varied career spanning over 25 years, Oorebeek has specialised in piano restoration, tone improvement and concert work for pianists, and tuning and technical work for recording studios. He is the founder and co-director of Grand Piano Technique, a piano restoration atelier in Amsterdam, and is also the concert technician and tuner of Amsterdam's Concertgebouw.