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  2. Harmonic seventh chord - Wikipedia

    en.wikipedia.org/wiki/Harmonic_seventh_chord

    The harmonic seventh chord is a major triad plus the harmonic seventh interval (ratio of 7:4, about 968.826 cents [1]). This interval is somewhat narrower (about 48.77 cents flatter, a septimal quarter tone ) and is "sweeter in quality" than an "ordinary" [ 2 ] minor seventh , which has a just intonation ratio of 9:5 [ 3 ] (1017.596 cents), or ...

  3. Harmonic seventh - Wikipedia

    en.wikipedia.org/wiki/Harmonic_seventh

    The harmonic seventh arises from the harmonic series as the interval between the fourth harmonic (second octave of the fundamental) and the seventh harmonic; in that octave, harmonics 4, 5, 6, and 7 constitute the four notes (in order) of a purely consonant major chord (root position) with an added minor seventh (or augmented sixth, depending ...

  4. Seventh chord - Wikipedia

    en.wikipedia.org/wiki/Seventh_chord

    The harmonic seventh chord is a dominant seventh chord formed by a major triad plus a harmonic seventh interval. The harmonic seventh interval is a minor seventh tuned in the 7:4 pitch ratio , one of the possible "just ratios" defined for this interval in just intonation (slightly below the width of a minor seventh as tuned in equal temperament ).

  5. 7-limit tuning - Wikipedia

    en.wikipedia.org/wiki/7-limit_tuning

    For example, the greater just minor seventh, 9:5 (Play ⓘ) is a 5-limit ratio, the harmonic seventh has the ratio 7:4 and is thus a septimal interval. Similarly, the septimal chromatic semitone, 21:20, is a septimal interval as 21÷7=3. The harmonic seventh is used in the barbershop seventh chord and music.

  6. Harmonic minor scale - Wikipedia

    en.wikipedia.org/wiki/Harmonic_minor_scale

    The harmonic minor scale (or Aeolian ♮7 scale) is a musical scale derived from the natural minor scale, with the minor seventh degree raised by one semitone to a major seventh, [2] [3] [4] creating an augmented second between the sixth and seventh degrees.

  7. Harmonic major scale - Wikipedia

    en.wikipedia.org/wiki/Harmonic_major_scale

    The harmonic major scale has its own set of modes, distinct from the harmonic minor, melodic minor, and major modes, depending on which note serves as the tonic.Below are the mode names, their degrees, and the following seventh chords that can be built using each modal tonic or degree of the parent mode as the root: a major seventh chord, a half-diminished seventh chord, a minor seventh chord ...

  8. Jazz harmony - Wikipedia

    en.wikipedia.org/wiki/Jazz_harmony

    Jazz harmony is notable for the use of seventh chords as the basic harmonic unit more often than triads, as in classical music. [2] In the words of Robert Rawlins and Nor Eddine Bahha, "7th chords provide the building blocks of jazz harmony." [2] The piano and guitar are the two instruments that typically provide harmony for a jazz group ...

  9. Chord notation - Wikipedia

    en.wikipedia.org/wiki/Chord_notation

    A ninth chord includes the seventh; without the seventh, the chord is not an extended chord but an added tone chord—in this case, an add 9. Ninths can be added to any chord but are most commonly seen with major, minor, and dominant seventh chords. The most commonly omitted note for a voicing is the perfect fifth.