- Edited
When I was a young teacher I was given advice I never forgot, "Don't give generalizations. Give concrete examples." So here are some actual experiences.
- As a violin student, I got stuck at the same measure for a month and had to abandon the piece. It was "very hard". I fell apart on the instrument and it was a bad experience. A decade later I discovered that I'd been taught to push the strings down way too hard - good for gut but not modern strings. I spent a week playing random notes, practising the sensation of pressing just hard enough to get a clean sound, with a relaxed hand. Then on impulse I pulled out he dreaded piece, heart pounding, daring to try playing it. I sailed right past the hard part, effortlessly!
This massive improvement was not due to 10 years having gone by. It is because I built good physical habits and reflexes, and they kicked in.
In that experiment, I applied the principles that MG has discovered, and others have told me about years ago. To retrain my hand, I had short sessions, sometimes half a minute or less, frequently. Any longer and your old reflexes will override, plus you won't be focusing anymore. I "slept on it". I pulled the old piece out after a week, because at least a week was needed for this to occur.
- I have some weak areas. Sense of pulse is one. Physical movement, because originally I learned piano self-taught as a child among other things. I've worked with more than one teacher, though mostly with a main one. In a recording of a beta stage, I may be asked, "Timing is off - is this physical or counting?" The answer will determine what the next practising will look like. It is not just "If this is wrong, try to get more rights than wrongs before moving on / try to get 10 rights in a row."
This can lead to tangents, and I'm told that even professional musicians may go on tangents. If some passage is hard, "skill X needs tweaking or a different approach" - then the focus might be skill X, and the piece might not be practised at all.
The thing with this is (afterthought), that while practising and observing, I want the flexibility of shaping that practice session and future ones according to what is going on. A predetermined schedule doesn't work for me. When I discovered poor physical habits in pedaling due to my old DP, I replanned practising so as to address this. Work on the physical act of pedal; put the piece aside or work on other aspects minus pedal; then add pedal; less measures so as to not lose the new skills.