10 years ago by
A Pianist
If you follow the movement of your finger in the direction of the arrow (diagonally forward into the key), you will see that the movement is initiated from the hand knuckle, but the other joints lengthen themselves. This will give you excellent control over the key. If you feel you need an explanation of why that is true, read Andrew's blog.
Do this very GENTLY and very SOFTLY. Do not press with the arm onto your hand and do not try to press the key through the keybottom. As soon as you can do this for all the fingers (slowly and softly, remember!), work with 2 fingers and do exactly the same. As soon as you can do it with 2 fingers simultaneously, take 3 etc. When you feel you are ready, you can take the notes of the Hanon and do the same there. Most importantly: DO NOT RUSH THIS! It is an exercise in awareness. You need to train the nervous system, not your muscles!
I want to add on to this (All of which I agree with most enthusiastically) with an illustrative video clip and a comment about the graphic.
The best video I've found showing this type of finger operation during actual performance is ; you can see this clearly in the left hand at 2:07 and 2:57.
Andrew's image depicts the wrist and the metacarpal joint at the same height relative to each other. This has a special significance regarding dynamics - see , particularly the second post.
P.S.1: The "wrist oscillations" Hanon talks about, which is actually forearm rotation, will take care of themselves if you let them. The underlying needed skill, though, is the finger movement.
Paul
While agreeing with your third point, here I object in the strongest imaginable way to the first two.
Admittedly, the term 'forearm rotation' is somewhat ambiguous. There are different ways of rotating the forearm. However, what I believe most people will think of when this is referred to is a type of motion where everything above the elbow could be considered stationary, and the radius of the forearm would circumscribe about the ulna (Either pronating or supinating).
I do not think this is a biomechanically optimal way of playing the passage that the original poster mentioned; and furthermore not how people that have been recognized elsewhere on this forum as having optimal or near-optimal piano technique play these types of passages.
My first disagreement can be evidenced through a simple experiment. Let us presume for the moment (This may be an unwarranted presumption, but let's assume not) that my anatomy and physiology is not very highly divergent from that of anyone else on this forum.
Place one of your hands on the bicep of the opposite arm. Now rotate the forearm in the way that I described above. You can feel that this motion is primarily driven by the bicep.
Let us now observe these two video clips of other pianists playing tremolos:
: Starting at :50.
: Starting at :08 and continuing afterwards.
What can be observed here is that the arm motion in question is not the type of forearm rotation I elucidated above. It is a type of whole-arm rotation. More precisely, if you imagine an axis between the shoulder and somewhere near the wrist, the arm oscillates back and forth about this axis rapidly. If the elbow joint is flexed, the elbow will be furthest from the axis, and hence its motion is the largest. Because of this, I encourage you to watch the above clips with special attention payed to the motion of the elbows. Then what makes these videos most illustrative is that you can directly observe that the size and rapidity of the movement corresponds with the dynamic level and tempo. As the tremolo crescendos, the oscillation becomes larger. As the tremolo accelerates, the oscillation becomes faster. Based on the information from , this involves the more powerful deltoid and teres muscle groups.
My disagreement with p2u's second point is based on my own experience with 2/3 trills, which requires the same kind of movement, albeit with a different distribution of work between the fingers and the arm. I was able to do the trill well enough with my right hand, not so with the left. After an extended period of observation, and making generous use of a mirror, I determined the arm rotation just described was occurring automatically during right hand trills, and nothing similar was happening with the left hand. After copying this motion with my left arm, eventually the trill improved to the same quality as with my right.
Here is another experiment you can try: get a friend who has never investigated this subject to pour you a cup of coffee, using the right hand and then the left. Don't mention anything about forearm rotation or elbows, but watch them carefully. I predict you will observe results similar to what was just described.
I think the key to the exercise mentioned in the first post is achieving the exact balance between the finger motion described above by Andrew and p2u and the arm motion I describe here. Also, playing it evenly requires making sure those notes that occur on downbeats fit properly into the rhythmic hierarchy (I know Alan discussed rhythmic hierarchies in his first book.)
Finally, we are all aware here that every single word written on this forum is analyzed and studied meticulously, and that our previous debates on these topics have been known to cause pedagogical schisms within the pianistic universe. Challenging the nature of a topic such as forearm rotation, which is of central significance in many technical pedagogical systems, will undoubtedly cause greatest controversy and division the same way the arm weight debate has in the past - and in the same manner as the arm weight debate, I anticipate the discussion will lead to deeper insight and facility to all involved.