The movement is Adagio in 4, not in sixteenth notes, which would make it too slow and heavy. Professor and student talk about the function of the movement in the whole sonata and the purpose of the ornamentation, as well as about phrasing, character, articulation in legato, use of right arm, vibrato - not in every note -, tension - relaxation of the harmony, pulse, articulation in left hand, and dynamics. In some specific passages, it is also possible to changes bowings.