QUOTE(Schubertiad @ Oct 14 2005, 08:17 PM)

:waits for steve hopwood to impart his words of wisdom...:
Thank you kindly. As it happens, I do have something to offer here.
First, let me say that this is one of the hardest of the Etudes. I have never actually mastered it, although I have it so well in my memory that I can relearn the notes in a matter of hours. This is one of the last of the Etudes I would recommend as a 'first' because of the impossiblity of mastering it; I do not need to describe the problems to you, Schubertiad.
At first glance, it appears logical to try to cover as many notes as possible and play with as little movement as possible.
Back in the early 1990's, I spent a few months on the performance masters course at Huddersfield University. Work pressure prevented me continuing on the course for more than a short time, but I did enjoy some teaching from Prabhu Singh, a magnificent piano teacher.
Prab pointed out that trying to play this study with minimal movement actually leads to hand, wrist and eventually every where else tension. He demonstrated how to play this:
Ascending: lead with the wrist. The position of the wrist will change with each new group of semiquavers, because it will need to return to a position that allows the thumb to play. It will never return to a position where the fingers are leading.
Descending: again, the wrist leads. This time, though, it describes a counter-clockwise circular action. The notes in bar 2 are (playing from memory here - I will check in the morning) E C G C. The wrist rises slightly towards the C with finger 4, slightly more towards G with finger 2, falls towards C with the thumb, then returns to the starting position for the start of the next group of semis.
You might identify a recurring theme in my postings about technical matters in these forums - the use of movement to relax tension and avoid physical exhaustion. Most of this stemmed directly from Prab's thought-provoking teaching; techniques I describe are those I use every day.
Sadly, Prab dies of cancer within two years of my meeting him. He was an inspirational teacher and I like to think that I am carrying his torch whenever I am able to offer advice that stems directly from his work.
Hope this helps
Steve