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A minor triad has a minor third (m3) on the bottom, a major third (M3) on top, and a perfect fifth (P5) between the outer notes. In harmonic analysis and on lead sheets, a C minor chord can be notated as Cm, C−, Cmin, or simply the lowercase "c". A minor triad is represented by the integer notation {0, 3, 7}.
By making use of flat symbols (♭) this notation thus represents notes by how they deviate from the notes in the major scale. Because of this, we say that a number without a flat represents a major (or perfect) interval, while a number with a flat represents a minor interval. In this example, the numbers mean: 1 = (perfect) unison; 2 = major ...
minor triads contain a minor third with a major third stacked above it, e.g., in the minor triad A–C–E (A minor), A–C is a minor third and C–E is a major third. diminished triads contain two minor thirds stacked, e.g., B–D–F (B diminished) augmented triads contain two major thirds stacked, e.g., D–F ♯ –A ♯ (D augmented).
There are four basic triads (major, minor, augmented, diminished). They are all tertian —which means defined by the root, a third, and a fifth . Since most other chords are made by adding one or more notes to these triads, the name and symbol of a chord is often built by just adding an interval number to the name and symbol of a triad.
It comprises a major triad with the added major sixth above the root, common in popular music. [3] For example, the chord C 6 contains the notes C–E–G–A. The minor sixth chord (min 6 or m 6, e.g., Cm 6) is a minor triad, still with a major 6. For example, the chord Cm 6 contains the notes C–E ♭ –G–A.
As discussed above, major and minor triads are constructed by stacking thirds: The major triad concatenates (M3,m3), supplementing M3 with a perfect-fifth (P5) interval, and; the minor triad concatenates (m3, M3), supplementing m3 with a P5 interval. Similar tertian harmonization yields the remaining two triads:
[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.
This triad is consequently called the supertonic diminished triad. Like the supertonic minor triad found in a major key, the supertonic diminished triad has a predominant function, almost always resolving to a dominant functioning chord. [7] If the music is in a minor key, diminished triads can also be found on the raised seventh note, ♯ vii o.