The student must communicate with all his body, including his face.
As the piece is a baroque sonata edited by Kreisler, the student has to decide how to perform the character and the baroque color, while maintaining Kreisler's elegance. It is a question of style and how to find the balance without ambiguity.
They make some comments about the most important aspects of the movement, melody - with correct articulation and rhythm, dynamics, vibrato (as singing, as a different color); phrasing - which should be as a text sentence: it needs breaks and different movements of breathing, appoggiatura; the connection of the notes, harmony, and the character of the movement (as a Sicilian dance).
The projection of the sound has to be similar to what singers do, but through the bow.