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The chord, infrequent in rock and popular music, is "virtually always found on the fourth scale degree in the major mode", thus making the seventh of the chord the third of the scale and perhaps explaining the rarity of the chord, given the "propensity of the third scale degree to be lowered as a blues alteration."
Dominant seventh chords are often built on the fifth scale degree (or dominant) of a key. For instance, in the C major scale, G is the fifth note of the scale, and the seventh chord built on G is the dominant seventh chord, G 7 (shown above). In this chord, F is a minor seventh above G.
More tunings of the minor chord are also available in various equal temperaments other than 12-TET. Rather than directly from the harmonic series, Sorge derived the minor chord from joining two major triads; for example the A minor triad being the confluence of the F and C major triads. [13] A–C–E = F–A–C–E–G. Given justly tuned ...
[8] For example, in the key of A minor, the dominant (V) chord (the triad built on the 5th scale degree, E) is a minor triad in the natural minor scale. But when the seventh degree is raised from G ♮ to G ♯, the triad becomes a major triad. "In fact, it created even more tension than the major key V7.
Seventh (F), in red, of a G7 dominant seventh chord in C Third inversion G7 chord; the seventh is the bass. In music, the seventh factor of a chord is the note or pitch seven scale degrees above the root or tonal center. [1] When the seventh is the bass note, or lowest note, of the expressed chord, the chord is in third inversion Play ⓘ.
A seventh chord with a minor third, perfect fifth, and minor seventh is commonly called a minor seventh chord, but also sometimes a minor/minor seventh chord to distinguish it from the minor/major seventh chord discussed below. It can be represented as either as m 7 or − 7, or in integer notation, {0, 3, 7, 10}.
That is, the implied seventh chord is a dominant seventh, i.e. a major triad plus the minor seventh, to which the ninth is added: e.g., a C 9 consists of C, E, G, B ♭ and D. C dominant ninth (C 9) would usually be expected to resolve to an F major chord (the implied key, C being the dominant of F).
An A-minor scale has the same pitches as the C major scale, because the C major and A minor keys are relative major and minor keys. A minor chord has the root and the fifth of the corresponding major chord, but its first interval is a minor third rather than a major third: