In general, Prof. Schellenberger indicates the student that he should improve the sound clarity, articulation, and he should also avoid stressing the final note in the trills. Schellenberger suggests him to play more relaxed.
Afterward, they discuss about the reeds and their differences: the professor recommends the student a reed with which he could "speak" more. Schellenberger also suggests a quicker movement of the tongue so that the attack for each note can be clearer and faster, but always keeping the jaw unmoving. When oboist moves the jaw or mouth, the pressure changes and the sound will not be steady.
The way to play this piece should be more "elastic", and the student should pay attention and listen himself to be aware about his sound quality and be able to correct it when it is not so good. As a conclusion, Hansjorg Schellenberger mentions the specific part of the reed where the pressure must be applied.