i never practice fast sections slowly. I try them fast. If its really difficult, i break it down into smaller pieces and do them fast.It just makes sure that i don't just repeat and learn it the slow way.
Which Chopin Etudes did you play, and did you learn them that way?
Practice only at full speed. In fact, practice faster than performance tempo! Never use the metronome, always hold the pedal down, and make sure you never hit the right notes twice in a row.
Slow or fast practice? A good question. As an amateur I find that slow practice is of enormous benefit. It has taken my own teacher a considerable time to get me to do this as I have always wanted to move more quickly than my abilities allow. Many times I have played a work at speed and in a way that I thought was reasonably good only to be told that I was just hanging on; that there were small errors where an ornament didn’t quite work, or where the rhythm went very slightly out of sync.In turn, he studied with Yves Nat at the Paris Conservatoire where students had a very disciplined regime. For practice sessions they were assigned to a more senior student who would sit with them controlling the metronome. The junior student would play a passage or section of a work to establish a suitable speed. If there was one single mistake or hesitation then the metronome would be set a couple of notches lower. Again, if there was any mistake or hesitation it would be slowed down further until a speed where everything was under perfect control was established. The junior student then had to be able to play this section six times perfectly before the metronome was put up a notch. This was the system until eventually, over several weeks full speed was attained. Interestingly, my teacher still practices in this way when preparing for a recital even if he has played the work many times before. It may take many weeks to get to performance speed but, believe me, he has everything under perfect control.Some time ago Ashkenazy was visiting my home. While I was talking with his wife he was practicing on my piano. When he had finished (about an hour later) we interrupted him and he beamed remarking that was the first time that he had played that section up to speed. (the work was the Rautavaara Concerto).So if slow practice is good enough for Yves Nat, my teacher, and for Ashkenazy then it is good enough for me. It is a slow and difficult discipline but the end result is worth the effort. Of course, each individual has to find the way that works best for him/herself – there is no single right way, only what works. For me it is disciplined slow practice.Wishing everyone a very happy Christmaselectrodoc
Thanks for the helpful comment Nick. You are entirely correct with your observation. However, many advanced pianists practice at slow speeds even when a work has reached performance level. By slow speeds I mean three-quarter speed or less. There must be good reason for this - full and complete control, development of subtle nuances, reinforcement of memory, etc.The danger of fast practice is developing small errors that become cumulative and may become locked in. It is then very difficult to eradicate the mistakes. I do not think that slow and progressive practice necessarily leads to incorrect muscular movement because the correct movement should develop (under control) as the speed increases.electrodoc
I heard that some pianists play at a tempo which allow absolute control over everything. When they encounter a difficult section they automatically slow down at a pace that enables them to control everything. Later on, they pick up all the difficult sections and they work out the difficult elements.