The answer is anywhere between 24 hours and never.Rather depends if you are John Ogdon or someone else.Impossible question really.Thal
My recollection may be rather hazy here, so anyone who knows the real story, please do correct me!
I have some vague recollection of reading somewhere that John Ogdon one replaced a pianist in a Rachmaninov concerto and when someone, rather surprised, noted Ogdon played the thing on sight when he earlier had said never to have studied the thing, Ogdon replied that he once had heard it on the radio, seeming surprised that anyone found that rather remarkable.
I have some vague recollection of reading somewhere that John Ogdon one replaced a pianist in a Rachmaninov concerto and when someone, rather surprised, noted Ogdon played the thing on sight when he earlier had said never to have studied the thing, Ogdon replied that he once had heard it on the radio, seeming surprised that anyone found that rather remarkable.My recollection may be rather hazy here, so anyone who knows the real story, please do correct me!
Personally I have never done well at "commiting to memory", so I don't try. Siatoslav Richter also saw no issue in performing from the score and as he is rated the greatest pianist of all time, I will follow his lead.
I have the same recollection old chap, but i thought it was Brahms.Will have to dig out me bio tonight.No doubt Mr Hinton will know.Thal
The fact that Richter played with a score in his late years does not mean that he didn't memorize everything he played before an audience. The score was used by Richter as a safe but he always played by heart, he didn't sight read the scores in public. Memorizing is a mandatory step in order to play well any piece. Memorizing is internalizing the music and is an excellent mental exercise that no serious pianist can avoid