Memorising is far more tiring than practice (physical) at the piano, so 20 minutes is probably far too much. Memorising requires complete concentration and focus. This is not something people are usually trained to do, specially in our modern society that encourages (eg action movies, TV) fast changes, and where everybody gets "bored" in a couple of minutes.Proper memory traning is similar to bringing an unfit personto marathon level. They cannot go from couch potatoes to 26 miles in under 4 hours in a week. Likewise, start memory training in very small periods of time (2 - 3 minutes) and increase 1 minute per week (or even per month). What is reallyimportant is consistency, that is doing it everyday.
That sounds like a good idea, whynot. That wouldn't be the same as listening to recordings of your pieces, would it? I'm not supposed to do that. But I do think that all the thoughts of "oh no, I messed this up before, I've got to get it right this time" don't help. Gotta work on that positive self-talk thing too.
All I know is that I told my teacher one time that I had listened to a recording of a piece as I was trying to learn it and he said, "Never listen to a recording! Find your own interpretation!"
I read your threads, Bernhard, and you make a very convincing argument for listening to CDs of my pieces. Should I do it, and just not tell my teacher? Or will he be able to tell that I'm listening?
I don't know about you, but I derive intense pleasure from listening to music. Indeed such strong is this pleasure, that I want to be part of it. I want to play myself, I want to play with others and I want to teach others to play. I want my life to revolve around music.
For example, memory depends on your emotional response, how well you "understand" your subject, etc.
My music does go around in my head at times; the other night I was trying to go to sleep, and I was reviewing the third movement, and I think I kept dozing off and waking up because I was skipping sections. . . . it was wierd.
First of all, it is ok to forget. Do not fear stumbling on a passage in the middle of a piece. This act in itself is a great memorization tool. Forgetting a passage is like highlighting an important sentence in a book. It brings to your attention any items that need more work.
Don't try to memorize in one whole big chunk of time. Memorizing is also connected with the task of recalling from memory. You need to practice recalling from long term memory: that is recalling something after a break of doing something else.