Professor Frankl gives some explanations about dynamics, articulation, pedal and sound balance: it is very frequent in Beethoven music to have a piano subito after a crescendo. The sforzati marks should be more separated, the articulation could be played as a detache. Referring to pedal, it is more difficult to use in articulated passages, so the student must identify those fragments. The most important thing is to understand and clarify the element to be highlighted in every moment.