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A "common chord" may also be defined simply as a triadic chord [2] (e.g., C–E–G), as one of the most commonly used chords in a key (I–IV–V–vi–ii–iii), [3] more narrowly as a triad in which the fifth is perfect (i.e., a major or minor triad), in which sense it is alternatively referred to as a "perfect chord" [4] [5] or, more ...
A computer program can quickly iterate all the triads and remove the ones that are merely transpositions of others, leaving (as noted above) nineteen or, to within inversional equivalence, twelve. As an example, the following list contains all trichords that can be made including the note C, but includes 36 that are merely transpositions or ...
The 4th mode of the Neapolitan major, also known as the Lydian Dominant ♭ 6 scale, is an excellent choice for the 9 ♯ 11 ♭ 13 chord. Said mode contains all the alterations plus the ♮ 5. A whole tone scale is often used but that mode tends to be minus the ♮ 5 that the Lydian Minor contains.
A major triad has a major third (M3) on the bottom, a minor third (m3) on top, and a perfect fifth (P5) between the outer notes. In harmonic analysis and on lead sheets, a C major chord can be notated as C, CM, CΔ, or Cmaj. A major triad is represented by the integer notation {0, 4, 7}.
Especially in its most common occurrence (as a triad in first inversion), the chord is known as the Neapolitan sixth: . The chord is called "Neapolitan" because it is associated with the Neapolitan School, which included Alessandro Scarlatti, Giovanni Battista Pergolesi, Giovanni Paisiello, Domenico Cimarosa, and other important 18th-century composers of Italian opera.
For example, a C-major triad consists of the (root, third, fifth)-notes (C, E, G). The three notes of a major triad have been introduced as an ordered triplet, namely (root, third, fifth), where the major third is four semitones above the root and where the perfect fifth is seven semitones above the root. This type of triad is in closed position.
Minor major seventh chord. A minor major seventh chord, or minor/major seventh chord (also known as the Hitchcock Chord) is a seventh chord composed of a root, minor third, perfect fifth, and major seventh (1, ♭ 3, 5, and 7). It can be viewed as a minor triad with an additional major seventh.
Lydian chords may function as subdominants or substitutes for the tonic in major keys. [3] The compound interval of the augmented eleventh (enharmonically equivalent to ♯ 4, the characteristic interval of the Lydian mode) is used since the simple fourth usually only appears in suspended chords (which replace the third with a natural fourth, for example C sus4).