Chords reference

Major Seventh Chord

A major seventh chord is a four-note chord containing a major triad and a major seventh above its root.

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C Major 7 on 6-string Guitarfull neck projection with 6 strings, frets 0 through 24, right-handed presentation, and notes labels.

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C Major 7 Chord

Theory
Chord
Written root
C
Instrument
6-string Guitar
Tuning
E Standard
Labels
Notes
Handedness
Right handed
C Major 7 visible positions on 6-string Guitar, using notes labels
String, low to highFretCurrent labelNoteDegreeIntervalRoot
10EE33No
13GG55No
17BB77No
18CC11Yes
112EE33No
115GG55No
119BB77No
120CC11Yes
124EE33No
22BB77No
23CC11Yes
27EE33No
210GG55No
214BB77No
215CC11Yes
219EE33No
222GG55No
32EE33No
35GG55No
39BB77No
310CC11Yes
314EE33No
317GG55No
321BB77No
322CC11Yes
40GG55No
44BB77No
45CC11Yes
49EE33No
412GG55No
416BB77No
417CC11Yes
421EE33No
424GG55No
50BB77No
51CC11Yes
55EE33No
58GG55No
512BB77No
513CC11Yes
517EE33No
520GG55No
524BB77No
60EE33No
63GG55No
67BB77No
68CC11Yes
612EE33No
615GG55No
619BB77No
620CC11Yes
624EE33No

Overview

Adding a major seventh extends the major triad without changing its underlying major quality. The new note lies a semitone below the octave root, creating colour and tension within an otherwise stable chord.

Construction

The authoritative definition combines a major triad with a major seventh. The interval between the seventh and an octave-equivalent root is a semitone, so voicing determines whether that close relationship is exposed or spread apart.

SQNTIAL Theory Authority

Definition
Major 7
Formula
1 · 3 · 5 · 7
Pitch count
4
Family
seventh

Characteristics

Major seventh chords can sound settled yet coloured, especially when functioning as a tonic. Their major seventh distinguishes them clearly from the minor seventh contained in dominant seventh chords.

Applications

The chord appears in major-key tonic and subdominant regions, modal harmony, sustained sonorities, arpeggios, and voice-leading studies. Comparing voicings reveals how spacing changes the prominence of its semitone tension.