How long does it take you to...

[bamba]

...forget a piece you learned?
How long after playing a piece for the last time could you no longer play it fully?
For me it takes anywhere between 1-3 months...
Also, do you have any accomplised pieces that you like to keep in your repertoire in the long term? If so, how often do you have to rehearse these to maintain them at a level of performance?
- peace

[pianoplayjl]

It takes around 2 months to forget. Yes, I want to keep my whole program for the future but I' m just a lazy guy who can't be bothered to put in that extra 1 hour every week to mantain it to well, a satisfactory level.

[octavius_trillson]

I'd say the same, about 1 to 3 months depending on how well I know the piece. I have chosen 6 or 7 pieces, which I like, that I play once through everyday after warming up. Then I start practicing new pieces or polishing any one of the ones I already know. Even if I don't have time to practice seriously I make sure that I play my favorite pieces at least once a day, everyday.

[rmbarbosa]

I use to study my pieces first only with the sheet music and without piano. I see its structure and fix the music in my mind untill I`m able to write it without mistakes. Only after this I go to the piano and practice bar to bar or phrase to phrase. first hands separated then hands together. I only go to the next bar when I`m able to play the anterior without mistakes. And each time I repeat all the bars I have studied.Doing so, when I am playing I know what I go to play some bars after the bar I`m playing. And this not only prevents mistakes when performing in public but also doesnt let me forget a piece I have studied.
I do know that this is a slow process of learn a piece. But it`s the only way I know to dont forget a piece, even months or years later. I learned this method from Lechtiwsky.

[bamba]

I use to study my pieces first only with the sheet music and without piano. I see its structure and fix the music in my mind untill I`m able to write it without mistakes. Only after this I go to the piano and practice bar to bar or phrase to phrase. first hands separated then hands together. I only go to the next bar when I`m able to play the anterior without mistakes. And each time I repeat all the bars I have studied.Doing so, when I am playing I know what I go to play some bars after the bar I`m playing. And this not only prevents mistakes when performing in public but also doesnt let me forget a piece I have studied.
I do know that this is a slow process of learn a piece. But it`s the only way I know to dont forget a piece, even months or years later. I learned this method from Lechtiwsky.

wow, sounds like a painstaking approach. I shall try it...
How do you memorize it? Do you write it like a hundred times or just review it mentally?

[perfect_pitch]

I practically never forget a single piece.

I usually still remember it note for note, and most dynamics, articulation etc... however I may be a little rusty in playing it after 10 years... but it's always embedded in my brain   

The frustration of having perfect pitch... Makes memorising music easy - but half the time I can barely remember where I left my keys...   

[pianoplayjl]

I usually forget pieces where there are more passages and scales as opposed to chords and octaves.