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D major
- D E F# G A B C# D
- D F# A
- E G B
- F A C#
- G A B
- A C E
- B D F#
- C E G#
A correction first
The first two lines above are right: the D major scale is D E F♯ G A B C♯ D, and the D major chord is D F♯ A. The lines after that were meant to be the chords of the key but several are wrong (D major has no F, C or G♯). Here are the correct seven chords, each built by stacking alternate notes of the scale:
| Degree | Chord | Notes | Quality |
|---|---|---|---|
| I | D | D F♯ A | major |
| ii | Em | E G B | minor |
| iii | F♯m | F♯ A C♯ | minor |
| IV | G | G B D | major |
| V | A | A C♯ E | major |
| vi | Bm | B D F♯ | minor |
| vii° | C♯dim | C♯ E G | diminished |
The plain idea
A key is a home base: a scale, its seven chords, and a sense that one note, the tonic, is where the music wants to rest. In D major that home is D. The key signature has two sharps, F♯ and C♯, and those are the only black-key notes in the scale.
Why D major matters
D major is one of the friendliest keys for many instruments:
- Guitar: the open D string is the tonic, open A is the fifth, and the main chords D, G, A, Em and Bm all have comfortable open or simple shapes. Countless folk, country and rock songs live here.
- Violin family: D and A are open strings, so D major rings beautifully. That’s one reason so many Baroque and Classical pieces are in D: Pachelbel’s Canon, Handel’s “Hallelujah” chorus and Beethoven’s and Brahms’s violin concertos are all in D major.
- Trumpet: natural (valveless) trumpets of the Baroque era were often pitched in D, giving D major its traditional association with festive, triumphant music.
An everyday analogy: a house with seven rooms
Think of the key as a house. D is the living room where everyone gathers. G (IV) and A (V) are the two rooms you pass through most often. Em, F♯m and Bm are cosier side rooms. C♯dim is the narrow hallway: you don’t linger there, you pass through on the way home. Songs wander through the rooms but nearly always end in the living room.
A worked example: one progression, four songs’ worth
The most famous progression in modern pop, I–V–vi–IV, in D is:
Strum each for four beats and you have the backbone of an enormous number of hits (the comedy group Axis of Awesome famously played dozens of songs over it). Swap the order to vi–IV–I–V (Bm–G–D–A) and the same four chords sound moodier, because you start on the minor chord. Same rooms, different route.
On guitar, D–A–Bm–G needs only one barre chord (Bm, which you can simplify by playing just the top four strings: x-x-4-4-3-2).
Relatives and neighbours
- Relative minor: B minor shares all the same notes (B C♯ D E F♯ G A). Songs often drift between D major and B minor.
- Neighbouring keys: G major (one sharp) and A major (three sharps) are one step away on the circle of fifths; modulating to them sounds smooth. See Musical Keys.
Common misconceptions
- “D major is a ‘happy’ key and D minor a ‘sad’ one, by nature.” With modern equal temperament every major key has the same internal structure; differences in “character” come from instruments, open strings and associations.
- “You need to know every key to start.” Learn D, G, C, A and E on guitar and you can play a vast number of songs.
How it connects
The truth revealed: two sharps and seven chords, and you have the home key of half the songbook.