![]() ![]() The harmonic seventh chord is a dominant seventh chord formed by a major triad plus a harmonic seventh interval. Tertian seventh chords used in Western music The less commonly found tertian is the minor/major seventh. The five commonly found in western music are the major seventh, the minor (or minor/minor) seventh, the dominant (or major/minor) seventh, the half-diminished seventh, and the diminished seventh, technically not a tertian chord, with its diminished third, but often listed with the tertian chords as commonly found. Since there are 3 third intervals in a seventh chord (4 notes) and each can be major or minor, there are 8 possible combinations. The most common chords are tertian, constructed using a sequence of major thirds (spanning 4 semitones) and/or minor thirds (3 semitones). For symbols used for seventh chords, see also Popular music symbols ยง Seventh chords. a "C" chord is a "C major triad", and a "C 7" chord is a " C major/minor seventh chord", also known as a "C dominant seventh chord"). When the type is not specified at all, the triad is assumed to be major, and the seventh is understood as a minor seventh (e.g. Additionally, half-diminished stands for diminished/minor, and dominant stands for major/minor. This rule is not valid for augmented chords: since the augmented/augmented chord is not commonly used, the abbreviation augmented is used for augmented/minor, rather than augmented/augmented. For instance, a major/major seventh is generally referred to as a major seventh. they are both major, minor, or diminished), the name is shortened. ![]() When the triad type and seventh type are identical (i.e. Most textbooks name these chords formally by the type of triad and type of seventh hence, a chord consisting of a major triad and a minor seventh above the root is referred to as a major/minor seventh chord. "A ranking by frequency of the seventh chords in C major would be approximately that shown." ![]()
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