Two interpretations of Bach's "Wachet auf ruft uns die Stimme" - Observation on good technique

The first interpretation has been made only a few days ago. The camera zooms in on the hands and shows how the fingers always remain in contact with the keys, also with trills. At the same time the wrist is relaxed and allows for movements in all directions. In this way one can play for hours without getting tired.

The second interpretation was made in 2014 and is slower.