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The major scale is the most used scale in Western tonal music, and its structure is one sentence:
whole — whole — half — whole — whole — whole — half
Seven notes, with the two semitones falling between steps 3–4 and steps 7–8. Those two places are the entire source of the major sound: a major third above the tonic (bright), and a minor second below it (a strong pull back home — the leading tone).
| Degree | Name | Interval above the tonic |
|---|---|---|
| 1 | tonic | — |
| 2 | supertonic | major second |
| 3 | mediant | major third (why major is "major") |
| 4 | subdominant | perfect fourth |
| 5 | dominant | perfect fifth |
| 6 | submediant | major sixth |
| 7 | leading tone | major seventh (demands a return) |
Why every beginner book starts here
Because the scale carries its own key-signature rule: go up in perfect fifths and sharps accumulate; go down in fifths and flats accumulate. The order of sharps is always F–C–G–D–A–E–B, and the order of flats is exactly the reverse. That rule is the circle of fifths, and it is where key signatures come from.
Major does not mean "happy"
The popular saying — major happy, minor sad — is only half true. What major actually supplies is stability: a major third, a major tonic triad, and a dominant and leading tone that pull hard toward home. The same structure writes marches and writes laments.
Diagram: where the two semitones sit
Listen: the two semitones
Hear it ascending, then press Down — the semitones stand out even more on the way down, because descending they are exactly the step that arrives home and the step that just left it.
Common misconceptions
- "Major means happy music." Major supplies stability and pull; mood comes from rhythm, harmony and tempo together.
- "There are twelve major scales because there are twelve semitones." There is one major pattern, startable on twelve pitches — and the extremes need enharmonic spelling (C♯ major and D♭ major are the same pitches).
- "The semitones sit at 3–4 and 7–8 because those gaps are smaller." That reverses cause and effect: the scale is defined first, and the semitone positions are its consequence.
- "No accidentals can appear in a major scale." They can. Lower the sixth degree and you get the descending form of melodic minor, or a folk-inflected colour.
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Listen in the library
All tracks from midicn-lib — inline badge is the license tier (C1 commercial / C2 non-commercial / C3 study only).
Sources
- 大调音阶的音程结构（全全半全全全半）与调号推导规则，属乐理通则
- 大调音阶共 15 个调号写法（含等音调）为通行表述
Used for fact-checking only; all prose is original.