| In Theaters: |
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1h 33m | Documentary
Stefan Knupfer, chief technician and piano tuner employed by Steinway & Sons, works directly with the great pianists of the world as they prepare for important concerts or recordings. Among them: Pierre-Laurent Aimard, with whom he takes a year to prepare for the recording of "The Art of Fugue" by Bach.
| Director: | Robert Cibis, Lilian Franck |
| Studio: | Cinéma Du Parc |
| Producer(s): | Robert Cibis, Lillian Franck |
| Cast: | Stephan Knüpfer, Pierre-Laurent Aimard, Lang Lang |
| Writer(s): | Robert Cibis, Lillian Franck |