What major and minor mean · From Zero to Mozart

"Major" and "minor" are not moods. They name an interval structure — a particular pattern of steps — and the note that decides which one you're in is the third degree.

It's the 3rd

From the tonic up to the 3rd:

a major 3rd = 4 half steps (two whole steps) → the scale is major;
a minor 3rd = 3 half steps (a whole step and a half) → the scale is minor.

G major's 3rd is B. G minor's 3rd is B♭. Move that one note down a half step and the whole scale changes character.

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The G major chord (G–B–D), then the G minor chord (G–B♭–D) — rolled bottom to top, open G and open D with the 3rd on the A string. Only that A-string note moved, a half step down. Play them one after another and hear the light go out.

Minor also lowers the 6th and 7th degrees compared to major — so the full natural-minor recipe is 1 2 ♭3 4 5 ♭6 ♭7. But the 3rd is the one your ear registers first as "it went minor."

Hear it — a tune that turns

The opening of Twinkle uses ^1, ^5 and ^6 — no 3rd — so here the 6th does the work. Play it in C major, then again with the A lowered to A♭ (borrowing from C minor):

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Twinkle in C major — bright, as you know it.

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The same Twinkle with the 6th degree lowered to A♭ (C minor). The tune is still Twinkle — but it has clouded over. One note did that.

The natural minor scale

Its step recipe is W – H – W – W – H – W – W. (It's the major-scale pattern started from its 6th note — more on that in Relative and parallel.)

The one you'll actually play this stage is E natural minor: E F♯ G A B C D E. It has one sharp (F♯) — and on the violin it uses the exact same first-position hand shape as the G major scale. You already know the fingering.

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E natural minor, one octave. Same sharps, same fingers as G major — only the starting note (and so the home) is different. Play it, and hear it lean toward E instead of G.

Try it

Try

On the A string, play A (open), then B (1st finger), then C♯ (high 2) — that's ^1 ^2 ^3 of A major, a major 3rd from A up to C♯. Now slide the 2nd finger back to C natural (low 2) — ^1 ^2 ♭3 of A minor, a minor 3rd. Back and forth, listening. The half-step slide of one finger is the whole difference between major and minor.

The usual mistake

"Minor means sad." It doesn't. Plenty of minor-key music is fierce, driving, or triumphant (think of a fast folk fiddle tune), and plenty of major-key music is heartbreaking. The key sets up an interval structure; the mood comes from tempo, rhythm, dynamics, melody and touch. Don't play every minor piece mournfully by reflex.