How to memorize piano music so it doesn't fall apart on stage

Most pianists memorize by accident. You practise a piece for six weeks, and one day you notice you are not looking at the score any more. That feels like memory, and in the practice room it is. Then you play it for someone — a teacher, a friend, a room of strangers — and somewhere on page two the hands stop, the mind goes white, and you discover that what you had was not memory. It was a very long habit, and habits break under adrenaline.

Memorizing on purpose is a different activity from learning the notes, and it is one that can be practised. Here is what it involves.

Four kinds of memory, and the one that betrays you

Pianists memorize with four systems at once, whether they mean to or not.

Finger memory (motor memory) is the sequence of movements. It is what forms by accident, it is fast, and it is the one that fails. It runs as a chain: each movement cues the next. Break one link — a wrong note, a cough in the hall, a moment of thinking about the audience — and there is no way back in except from the beginning.

Aural memory is hearing the piece in your head, a beat ahead of your hands. It is what lets you find your way back after a slip, because the ear knows what comes next even when the fingers have lost the thread.

Visual memory is the page, or the keyboard: seeing the shape of the passage, the position of the hand, the look of the score at that bar.

Analytical memory is knowing what the music is: this is the second theme, in the dominant, with the bass walking down by step; here it modulates to the relative minor; this passage is the same as bar 12 with the hands swapped. Analytical memory is slow to build and almost impossible to lose. It is the scaffolding that holds the other three up.

Reliable memorization is deliberately building the last three so that the first one is never alone.

Start with starting points

The first thing to do with a piece you intend to memorize is to divide it into sections with starting points — places you can begin from cold, without a run-up. Every phrase boundary is a candidate; in a sonata movement there might be fifteen or twenty. Number them in the score.

Then practise starting. Not playing through: starting. Pick a number at random and begin there, from memory, with the right hand position, the right tempo, the right dynamic. If you cannot, you have found a place where the chain is the only thing holding the piece together. Work that starting point until it is instant.

The test is brutal and simple: a friend (or a dice) calls a number, and you start there within two seconds. A piece with twenty reliable starting points cannot fall apart, because there is nowhere to fall further than the next one.

Analyse until it is boring

For every section, be able to say what it is in plain words. Key. Harmony, at least at the bar level — you do not need to name every chord, but you need to know where the bass goes. Which sections are repeats or variants of which others, and exactly how they differ (the second time the tune comes back, the left hand has the tune and the right hand has the accompaniment; the coda is the opening, in the minor). Where the modulations happen and where they land.

This feels like homework and it is the highest-return memorization work there is, because it turns a chain of movements into a map. Under pressure, a map survives. Even if the hands blank, the mind knows this is the second theme in the dominant, the bass goes down by step from here — and the hands, given that much, can usually find it.

Write the analysis in the notes on the piece. It is exactly the sort of thing that should greet you the next time you press play on it.

Hear it away from the piano

Sit somewhere without a piano and play the piece in your head, from the beginning, at tempo, hearing every note. Where it goes vague is where the aural memory is thin. Go back to the piano, play that passage, listen, and try again the next day. Sing the melody — actually sing it — and the bass line separately. If you can sing the bass line of the development section from memory, you know the development section.

This is also the practice you can do on the train, and it is worth more per minute than almost anything you do at the instrument.

The tests that count

Playing it through from memory, in your practice room, at your own tempo, when you are calm, is not a test of memory; it is a test of the chain, and the chain is not what fails. These are tests:

• Start anywhere. The starting-point drill, with the numbers called at random.
• Play it slowly. Half tempo from memory. Finger memory hates this — the chain runs at one speed — so what survives at half tempo is real memory.
• Play one hand alone from memory. The left hand alone is the great revealer. Most players cannot do it for passages they believe are memorized.
• Play it with a distraction. Someone talking to you. The television on. Counting backwards from a hundred in your head during the easy bits.
• Record it. Not because the recording tests memory, but because the red light produces a small, useful dose of the adrenaline you will have on stage. If it wobbles under the red light, it will wobble under the stage light. Chopinly's recorder keeps the take on the piece; a week of takes shows whether the wobble is moving or fixed.
• Play it for someone. Then someone else. Every performance before the performance is memory practice.

A piece that passes all six is memorized. A piece that passes only the play-through is rehearsed.

Spacing, and the week before

Memory consolidates between sessions, so memorization rewards spacing more than any other kind of practice. Three ten-minute memory sessions across a day beat a single half hour. Memorize a section, leave it, come back tomorrow and test it cold before you touch anything else. What is still there was learned; what is not needs another pass.

In the week before a performance, do less, not more. Slow play-throughs from memory, the starting-point drill, mental practice away from the piano, one run a day at tempo. Cramming the night before builds finger memory and fatigue, both of which fail on stage. Trust the map.

When it goes wrong anyway

It will, sometimes, and the difference between a professional and an amateur is not that the professional never blanks. It is that the professional has a next starting point, knows what key it is in, can hear it, and gets there before the audience has noticed anything but a strange little pause. Every part of this article is preparation for that moment. Build the map, and the blank becomes a detour rather than a cliff.