Each of us has our own timing. Of course, one cannot study a Scarlatti sonata for a year straight. However, let's keep in mind that even when we have reached sufficient knowledge to perform it, once set aside, it continues to mature within us. Remarkably, after having played it in concert and/or performed it at an exam, its "maturation" continues. Certainly, after a year, we will play it even better....if we have studied it well.
After a study session, we must always examine the added value of this effort. What remains with us extra is what we have gained.
In Scarlatti's case, I note two aspects: rhythmic-harmonic understanding and the resolution of "technical" skills. In the case of No. 33, we are faced with a polyphonic sonata that resembles neither Bach nor any other composer. Its texture is "weeping." I find it "dramatic" and I find Horowitz's interpretation extraordinary. He loved this sonata very much and performed it in several concerts. Thus, we have several recordings. Listen to them, even if you should not take them as a "model," which belongs to him and him alone.
Here the difficulty lies in the intense and legato sound. This, I believe, cannot be achieved without good participation of the arm and shoulder. Almost with "pressure."
I do not believe expression should be sacrificed.
I believe there are two interpretative tendencies:
1) Scarlatti must be performed as if on the harpsichord, trying to reconstruct a sound at the piano that evokes that of the instrument for which these 550 sonatas were written (Essercizi per gravicembalo)
2) Updating the sound by exploiting the possibilities of our modern instrument, intended for the listening of a 21st-century ear.
I am not decisively in favor of just one of these choices. I believe that some sonatas are closer to the harpsichord sound and brilliance, while others can take advantage of an expressive and complex instrument like the piano.
I also want to remind you that the harpsichord and the fortepiano, although weaker in sound and attack, are instruments that develop a harmonic spectrum superior to that of the piano.
Of course, the "attack transient" on the piano is powerful and stimulates the modern ear "by necessity"....which is much more deaf than that of that time.
Our emotional state is also different.
At that time, enthusiasm "burst" more easily and frequently. Consider that today we cannot listen to a harpsichord if we are in the middle of the hall. At that time, audiometric listening capacity was much higher and people would applaud standing up after a particularly bold or difficult passage......Other times!!!!!
Alright, I don't want to go on too long.
Start with hands separate and choose a comfortable fingering to play very legato. However, the pedal must not be absent. Put small episodes together with both hands. Slowly. Greatly emphasize the cantability of the thematic parts. Good luck, it is not one of the easiest sonatas....but it is one of the most beautiful.
If you want, send me an MP3 of how you are approaching your study.
Bye
Paolo