I don't think you can practice the whole piece fast. That would mean you can already play it, and have acquired the skill you need.
You can practice a small chunk of it. It might have to be very small. And it will be hands separate. But you can do it, then slow that down.
I have read Chang book and most of Bernahrd post
What they said I already "INTUITIVELY" knew and applied to my practice instinctively (that's why I don't agree in calling the "popular method" the "intuitive methods"
So I already did small section practice, HS, thinking of my practicing time as solving technical problems, making loops out of difficult coordination passages ...
But what I have never understood is the fast-practice theory
I too meet speed walls as I play first a piece slow and the try to speed it up
So we were told that we needed to choose a chunck small enough that we can play FAST from the very beginning so we can know the right movements and not using "
slow unappropriate movements"
Only that I never found a chunk small enough. Even if I choose 4 notes I can't play "
FAST" from the beginning without missing all the notes or hurting my hands
So I have to resort to practicing the passage as slow as I can
According to Bernhard this will just ingrain the "
wrong movements" and when I will have to play fast it will be like relearning the whole piece (hence I've wasted my time)
So the next theory was that you just need to find the "
right fast movement" the first time and then you can practice slow but "
using the movements that you know to work well at fast speed"
But again this require me to "
try" fast speed on a passage the first time I play it and no matter how small the passage is, I can't play it fast without missing of all the note or hurting my hands
The last resort was parallel sets
If the passage is to hard, "
play it as a chord" which is like "
the fastest speed possible (at the same time)" and "
roll the chord" so as to make a passage out of the perfect chord.
But this never worked with me. The ability to play the chord well didn't translate in making the passage easier at a very fast speed
I think I have covered all ...
Can someone help me understand the controversy?