Whole steps and half steps · From Zero to Mozart

Scales are built out of just two sizes of step. Get these two straight and the rest of the stage falls into place.

A half step (or semitone) is the smallest ordinary step in Western music — one note to its closest possible neighbour. A whole step (or tone) is two half steps. Steps are distances, not notes: "whole" and "half" describe the gap between two notes, not the notes themselves.

Where the half steps hide

Here's the catch that makes scales interesting. On the musical alphabet — A B C D E F G — most neighbours are a whole step apart, but two pairs are only a half step:

E → F and B → C.

There's no note between E and F, and none between B and C. Everywhere else — C→D, D→E, F→G, G→A, A→B — you can fit a note between (that's what the sharps and flats are for), so those gaps are whole steps.

60 bpm

The two natural half steps: E–F and B–C. On the violin, the low 2nd finger sits right against the 1st — the fingers almost touch.

On the violin: fingers touching

You already know this shape from Stage 1's finger patterns. Fingers apart = a whole step. Fingers touching = a half step. You feel the difference; there's nothing to see on the fingerboard.

60 bpm

D up to F♯ is a whole step (open string to a spread 2nd finger — a gap). F♯ up to G is a half step (high 2nd finger and 3rd finger touching).

Hear it

60 bpm

First bar: A up to B, a whole step — an open, roomy move. Second bar: A up to A♯, a half step — the 1st finger pulled right back, close to the nut. Play both and listen for how much narrower the second one is.

Try it

Try

On the D string, find every half step you can reach in first position: E→F (1st finger, then low 2nd against it), F♯→G (high 2nd against 3rd), G♯→A (high 3rd against 4th). Each time, feel the two fingers come together. Then play D→E, a whole step, and feel the gap.

The half steps in a scale

Play G major slowly and listen for the two spots where the step is small — where the fingers touch:

72 bpm

G major. The half steps are B→C (3rd degree to 4th) and F♯→G (7th to 8th) — both times the fingers touch. Every other step is a whole step.

The usual mistake

Assuming every letter-to-next-letter step is the same size, and spacing your fingers evenly by default. They aren't and you can't. E–F and B–C are half the size of the others, and that built-in unevenness is the whole reason a scale has a shape — and the reason some keys need sharps and some need flats.