Fundamentals
18 Seventh Chords
Chelsey Hamm
Key Takeaways
- A seventh chord is a four-note chord whose notes can be arranged in thirds. A seventh chord can always be “stacked” so that its notes are either on all lines or all spaces.
- When stacked in its most compact form in thirds, the lowest note of a seventh chord is called the root, the lower middle note is called the third, the upper middle note is called the fifth, and the highest note is called the chordal seventh.
- There are five common qualities of seventh chord. These qualities are the major-major seventh chord, major-minor seventh chord, minor-minor seventh chord, half-diminished seventh chord, and the fully diminished seventh chord.
- There is another common way of naming seventh chords: the major-major seventh chord is also often called the major seventh chord, the major-minor seventh chord is also often called the dominant seventh chord, the minor-minor seventh chord is also often called the minor seventh chord, and the fully diminished seventh chord is also often simply called the diminished seventh chord
- Within major and minor keys, seventh chords have particular qualities that correspond to scale-degrees. These are the same in every major and minor key, which makes memorizing them useful.
- Seventh chords are identified by their root, quality of triad and chordal seventh, and inversion.
In this chapter we will focus upon seventh chords: four-note chords whose notes can be stacked into thirds.
Seventh Chords
Like triads, the notes of a seventh chord can always be arranged in thirds.
shows a seventh chord written both melodically and harmonically:
This seventh chord is written on four adjacent spaces; however, seventh chords can also appear on four adjacent lines when stacked in thirds. If a triad in closed spacing looks like a snowperson, then a seventh chord in closed spacing looks like an extra-long snowperson, with a bottom, two middles, and a head.
When a seventh chord is stacked in this manner, the lowest note is called the the root. The notes above the root are called the third, the fifth, and the chordal seventh . shows this:
Like a triad, the third is so named because it is a generic third above the root, the fifth is so named because it is a generic fifth above the root, and the chordal seventh is so named because it is a generic seventh above the root. The root is analogous to a snowperson’s bottom, the third and the fifth to its “extra-long” middle, and the chordal seventh to its head.
Seventh Chord Qualities and Listening to Seventh Chords
There are five common qualities of seventh chord: a major-major seventh chord, a major-minor seventh chord, a minor-minor seventh chord, a half-diminished seventh chord, and a fully diminished seventh chord. The top line of
shows the five qualities of chordal seventh in each of these seventh chords, each with a root of F, while the bottom line of shows their qualities of triad labeled:
As seen in major-major seventh chord has a major triad and a major seventh, while a major-minor seventh chord has a major triad and a minor seventh. A minor-minor seventh chord has a minor triad and a minor seventh. Both a half-diminished seventh chord and a fully diminished seventh chord have a diminished triad—their difference lies in their quality of chordal seventh. A half-diminished seventh chord contains a minor chordal seventh, while a fully diminished seventh chord contains a diminished chordal seventh.
, aThe names of seventh chords listed above—major-major, major-minor, minor-minor, half-diminished, and fully diminished—are a common way for music theorists to name seventh chords. However, there is another common way of naming these chords:
- The major-major seventh chord is also often called the major seventh chord.
- The major-minor seventh chord is also often called the dominant seventh chord.
- The minor-minor seventh chord is also often called the minor seventh chord.
- The fully diminished seventh chord is also often simply called the diminished seventh chord.
- The half-diminished seventh chord does not typically have an alternate name.
Your instructor may have you label these chords using one set of terminology or the other, or a mix of both.
Listen carefully to the different qualities of seventh chord in
:
It is common to pair expressive qualities with seventh chords when learning what they sound like. You might think of major-major seventh chords as sounding “happy and jazzy,” major-minor seventh chords as sounding “unresolved” (like they strongly need to move to another chord), minor-minor seventh chords as “sad and jazzy,” half-diminished seventh chords as “scary and jazzy,” and fully diminished seventh chords as “very scary.”
Shorthand and Chord Symbols of Seventh Chords
There are several different ways of naming seventh chords.
summarizes the shorthand system for naming seventh chords that was described above:[table id=55 /]
Chord symbols for seventh chords often include the letter name of the triad’s root, some indication of their quality of triad and seventh, and an indication of the pitch class that occurs in the bass voice if it is not the root, as explored more in the Inversions and Figured Bass chapter.
shows common chord symbols for seventh chords (a root of “F” has been used as the example in the right-side column):
[table id=56 /]
Don’t forget that when the root of a seventh chord has accidentals you add these accidentals into its name. For example, a B♭mm7 (chord symbol B♭m7) chord would be the shorthand for a seventh chord with a B♭ minor triad and a minor seventh. Likewise, a G♯∆7 (shorthand G♯MM7) is the chord symbol for a seventh chord with a G♯ major triad and a major seventh.
In chord-symbol notation, if a pitch class other than the chord’s root is the lowest note in a seventh chord, then a slash is added, followed by a capital letter denoting the pitch class in the bass (lowest) voice.
shows two seventh chords in chord-symbol notation. The chords in measure 1 has the root in the bass, while the chord in measure 2 does not:
In the first measure of Inversion and Figured Bass.
, a Gø7 (shorthand Gø7) appears in root position. In the next measure the same chord is shown, but with the note “F” in the bass voice. This topic will be explored more below in the chapterSeventh Chord Qualities in Major and Minor
Seventh chords can be built on any note of the major scale, as shown in
:
As you can see in
, which is in the key of G major, seventh chords built on do [latex](\hat1)[/latex] and fa [latex](\hat4)[/latex] have a major triad and a major seventh, while seventh chords built on sol [latex](\hat5)[/latex] have a a major triad and a minor seventh (a dominant seventh chord). Seventh chords built on re, mi, and la [latex](\hat2,\ \hat3,[/latex] and [latex]\hat6)[/latex] have a minor triad and a minor seventh, while seventh chords built on ti [latex](\hat7)[/latex] are half-diminished—they have a diminished triad and a minor seventh. These seventh chord qualities do not change in different keys; consequently, memorizing these qualities can be very useful.Triads can be build on any note of the minor scale, as shown in
:
, which is in the key of G minor, contains only one seventh chord built on sol [latex](\hat5)[/latex] and one on ti [latex](\hat7)[/latex]. It is common for these seventh chords to contain the raised leading tone—ti instead of te [latex](\hat7[/latex] instead of [latex]\downarrow\hat7)[/latex]. In , seventh chords built on do and fa [latex](\hat1[/latex] and [latex]\hat4)[/latex] have a minor triad and a minor seventh, while seventh chords build on sol [latex](\hat5)[/latex] with the raised leading tone has a major triad and a minor seventh (a dominant seventh chord). Seventh chords built on me and le [latex](\downarrow\hat3[/latex] and [latex]\downarrow\hat6)[/latex] have a major triad and a major seventh, while those built on re [latex](\hat2)[/latex] are half-diminished (containing a diminished triad and a minor seventh), and those built on ti [latex](\hat7)[/latex] are fully diminished (containing a diminished triad and a diminished seventh).
Spelling Seventh Chords
To build a seventh chord from a chord symbol, you need to be aware of its root and quality—inversion is discussed in the next chapter titled Inversion and Figured Bass. The steps for spelling a seventh chord are similar to the steps for drawing a triad. Let’s start with spelling a major-major seventh chord:
- Draw the root on the staff.
- Draw notes a third, fifth, and seventh above the root (i.e., draw an “extra-long” snowperson).
- Think of (or write down) the major key signature of the triad’s root.
- Write any accidentals from the key signature if notes in that key signature appear in the triad for a major triad and major seventh.
- For any other quality of seventh chord, add additional accidentals to alter the chord’s third, fifth, and/or seventh when appropriate.
shows this process for a DMM7 (chord symbol DM7):
The process for writing this seventh chord is as follows:
- First, the note D, the chord’s root, is drawn on the staff.
- Second, an extra-long snowperson is drawn—an F, A, and C, the notes a generic third, fifth, and chordal seventh above the D.
- Third, the key signature of D major has been recalled. D major has two sharps, F♯ and C♯.
- Fourth, a sharp (♯) has been added to the left of the F and to the left of the C, because F♯ and C♯ are in the key signature of D major.
Let’s complete this process for a quality of seventh chord in which we will need to add additional accidentals.
shows the process for an A♭o7 (shorthand A♭o7):
The process for this example has been broken into steps to make it simpler:
- First, the note A♭ is written because it is the root of the triad.
- Second, an extra-long snowperson is drawn; in other words, the notes C, E, and G are added because they are a generic third, fifth, and seventh respectively above A♭.
- Third, the key signature of A♭ major is recalled. A♭ major has four flats, B♭, E♭, A♭, and D♭. Fourth, E♭ is added, because it is in the key signature of A♭ major. No B♭ or D♭ are needed, because those notes don’t appear in this seventh chord.
- Now we have successfully spelled an A♭MM7, chord symbol A♭maj7 (A♭, C, E♭, and G). A fully diminished seventh chord contains a diminished triad and a diminished seventh.
- Fifth, in order to make the chord’s triad diminished, we lower its third and fifth by a half-step. This means that A♭, C, E♭ become A♭, C♭, and E𝄫. We need to lower the chord’s seventh by two half-steps in order to make it diminished. This means that the chord’s G becomes a G𝄫. Now we have an A♭o7 (shorthand A♭o7) chord (A♭, C♭, E𝄫, and G𝄫).
The process listed above is an easy way for beginners to be sure that they are able to consistently spell seventh chords. However, it is a time consuming process. If you practice playing all of the qualities of seventh chords on an instrument, such as a keyboard or guitar, until you are fluent in them and your knowledge of these notes becomes more automatic without using this process.
Identifying Seventh Chords, Doubling, and Spacing
Like triads, seventh chords are also identified according to their root, quality, and inversion; however, inversion is discussed in Inversion and Figured Bass. shows a seventh chord in root position for the process of identification:
You can identify seventh chords in four steps:
- Identify and write its root.
- Imagine the major key signature of its root.
- Identify and write its quality of triad.
- Identify and write its quality of seventh.
The process for this example has been broken into steps to make it simpler:
- To identify this seventh chord, you first identify and write its root. Because the triad is in root position, its lowest note is its root—in this case C♯.
- Now you can identify and write its quality of triad and chordal seventh. To do this, you will need to imagine the major key signature of its root. The key of C♯ major has seven sharps (every note is sharp). Therefore, E and G would be sharp in a C♯ major key.
- Instead, both of these notes have been lowered by a half-step. Therefore, this triad is diminished.
- Now we must identify the quality of its chordal seventh. In the key of C♯ major the note B would be B♯. Instead it is B♮—it has been lowered by a half-step. Therefore this chordal seventh is minor. A diminished triad and a minor seventh form a half-diminished chord; therefore, this chord is C♯ø7. We would correctly identify this triad as a C♯ø7 (shorthand C♯ø7) chord.
If the bottom note of a seventh chord has an imaginary key signature (because there is a double accidental that applies to it), use enharmonic equivalence to respell the seventh chord. The process for this will be the same as that outlined in the last section of Intervals.
Like triads, the doubling of notes does not affect a seventh chord’s identification. Furthermore, the spacing of notes more than an octave does not affect a seventh chord’s identification, even if more than one clef is used. shows two different seventh chords in open spacing with doublings.
Neither of these factors will affect how you identify these seventh chords. Simply imagine or write the notes of seventh chords in closed spacing without any doublings to identify these chords, as we did previously.
- Seventh Chords (musictheory.net)
- Understanding Seventh Chords in Music (Hello Music Theory)
- Introduction to Seventh Chords (Robert Hutchinson)
- Seventh Chords (Kaitlin Bove)
- Seventh Chords (Music Theory Academy)
- Seventh Chords (Carleton College)
- Seventh Chords For Dummies (YouTube)
- Seventh Chords – Music Theory Crash Course (YouTube)
- Seventh Chord Ear Training (teoria)
- Chord Ear Training (musictheory.net)
- Chord Ear Training (Tone Savvy)
- Seventh Chord Construction (.pdf, .pdf), p. 1 .pdf)
- Constructing and Identifying Seventh Chords (.pdf)
- Identifying Root Position Diatonic Seventh Chords, Major, p.1 (.pdf)
- Identifying Root Position Diatonic Seventh Chords, Minor, p.1 (.pdf)
- Seventh Chords Assignment #1 (.pdf, .mcsz)
- Seventh Chords Assignment #2 (.pdf, .mcsz)
- Seventh Chords Assignment #3 (.pdf, .mcsz)
A four-note chord whose pitch classes can be arranged as thirds
The lowest note of a triad or seventh chord when the chord is in root position
The note of a triad or seventh chord a third above the root
The note of a triad or seventh chord a fifth above the root
The note of a seventh chord a seventh above the root
A seventh chord whose triad is major and whose seventh is major
A seventh chord whose triad is major and whose seventh is minor
A seventh chord whose triad is minor and whose seventh is minor
A seventh chord in which the triad quality is diminished and the seventh quality is minor. For example: B–D-F-A.
A seventh chord whose triad is diminished and whose seventh is diminished
Another name for a major-major seventh chord, a seventh chord with a major triad and a major seventh
A seventh chord in which the triad quality is major and the seventh quality is minor. For example: C–E–G–B♭
Another name for a minor minor seventh chord, a seventh chord with a minor triad and a minor seventh
Another name for a fully diminished seventh chord, a seventh chord with a diminished triad and a diminished seventh
When applied to an interval, the term "quality" modifies the size descriptor in order to be more specific about the exact number of semitones in the interval
When applied to triadic harmony, "quality" refers to the size of the different intervals that make up the harmony
Chords that do not have their root in the bass voice
The most compact (i.e. "snowperson") form of a chord
The lowest part (or "voice") of a composition
Duplicating some notes of a chord in multiple parts
Notes of a chord are spaced out beyond their closest possible position