Hands Separately, or Together?

Why separately comes first

Each hand is a motor pattern. The brain learns one at a time, and it learns whatever you actually do - including the mistakes. Practising a scale hands together before either hand is secure means rehearsing two half-learned patterns simultaneously, and the unevenness gets learned along with the notes.

The part that surprises people: hands together is a third pattern, not the sum of the first two. The first time you combine two fluent hands the result is worse than either hand alone, and that is completely normal. You are not going backwards, you are starting something new.

The two hands do not stumble in the same place

This is the reason hands together hides the fault, and it is not a matter of opinion - it falls out of the standard fingering.

Take C major, ascending, one octave. The notes are C D E F G A B C.

Read the two bold numbers. The right-hand thumb comes under between the third and fourth notes, E to F. The left hand crosses its third finger over the thumb between the fifth and sixth, G to A.

Two hand repositions, at two different moments, inside one run of eight notes. Each one is a place where a small gap or a bump can appear. Played together, they are close enough that you hear a single scale that was slightly untidy somewhere in the middle, and your ear cannot reliably tell you which hand did it or on which note.

Finding out which hand it actually was

The traditional answer is to go back to hands separately and listen hard. That works, but it is slow and it relies on hearing something in your own playing that is genuinely hard to hear - which is why students so often practise the hand that was already fine.

The other option is to measure it. Play the scale once, with both hands, and have each hand scored independently from that single take: the notes, the evenness of the gaps, the loudness of each note and how long each one sounded, reported per hand rather than mixed together.

What that means in practice is that hands-together practice stops being a test you either pass or fail, and becomes diagnostic: you can practise both hands together and still find out what each one is doing. There is a full breakdown of the measurements, and their limits, in how scale grading works.

A working order

1. Right hand alone until the fingering is automatic and the thumb turn is silent. Slowly enough that you can see the thumb travelling before it plays.
2. Left hand alone to the same standard. It usually needs longer, and it usually gets less.
3. Both hands, well below either hand's tempo. Expect it to be worse at first.
4. When it is uneven, find the hand before you repeat it. Repeating the whole scale is how a fault in one hand becomes a fault in both.
5. Go back to that hand alone, fix the specific spot, and only then recombine.

Step 4 is the one people skip, and it is the one that decides whether the hour did anything. The tempo ladder covers how far to drop back and when to move up.

Go deeper

• Build a practice routine Scales, exercises and rhythm drills in an order you set once, so a tired evening still counts.
• How to practise scales evenly The tempo ladder, the session plan, and what to listen for at the thumb turn.
• How grading works The four measurements, the named faults, and an honest list of what a MIDI keyboard cannot see.
• Piano scale fingering All 12 major scales and the common minors, both hands, and where each hand crosses.
• C major scale Where to start, and the clearest place to watch the thumb turn.