page_title: Guitar chord
section_title: More sevenths: Major, minor, and (half-)diminished
hierarchical_section_title: Guitar chord / Intermediate chords / Tertian harmonization / More sevenths: Major, minor, and (half-)diminished
caption_attribution_description: English: Created by Hyacinth (talk) 06:33, 14 August 2011 (UTC) using Sibelius 5. "A ranking by frequency of the seventh chords in major would be approximately that shown..."
context_page_description: In music, a guitar chord is a set of notes played on a guitar. A chord's notes are often played simultaneously, but they can be played sequentially in an arpeggio.
  The implementation of guitar chords depends on the guitar tuning. Most guitars used in popular music have six strings with the "standard" tuning of the Spanish classical guitar, namely E-A-D-G-B-E'; in standard tuning, the intervals present among adjacent strings are perfect fourths except for the major third. Standard tuning requires four chord-shapes for the major triads.
  There are separate chord-forms for chords having their root note on the third, fourth, fifth, and sixth strings. For a six-string guitar in standard tuning, it may be necessary to drop or omit one or more tones from the chord; this is typically the root or fifth. The layout of notes on the fretboard in standard tuning often forces guitarists to permute the tonal order of notes in a chord.
  The playing of conventional chords is simplified by open tunings, which are especially popular in folk, blues guitar and non-Spanish classical guitar.
context_section_description: Stacking thirds also constructs the most used seventh-chords. The most important seventh-chords concatenate a major triad with a third interval, supplementing it with a seventh interval:
  The (dominant) major-minor seventh concatenates a major triad with another minor third, supplementing it with a minor-seventh interval.
  The major seventh concatenates a major triad with a major third, supplementing it with a major-seventh interval.
  The minor seventh concatenates a minor triad with a minor third, supplementing it with a minor-seventh interval.
  The half-diminished seventh concatenates a diminished triad with a major third, supplementing it with a diminished-seventh interval.
  The (fully) diminished seventh concatenates a diminished triad with a minor third, supplementing it with a diminished-seventh interval.
  Four of these five seventh-chords—all but the diminished seventh—are constructed via the tertian harmonization of a major scale. As already stated,
  The major-minor seventh has the dominant V⁷ function.
  The major seventh plays the tonic (I7) and subdominant (IV⁷) roles;
  The minor seventh plays the ii⁷, iii⁷, and vi⁷ roles.
  The half-diminished seventh plays the viiø⁷ role.
  While absent from the tertian harmonization of the major scale,
  The diminished seventh plays the viiᵒ⁷ role in the tertian harmonization of the harmonic minor scale.
  Besides these five types there are many more seventh-chords, which are less used in the tonal harmony of the common-practice period.
  When playing seventh chords, guitarists often play only subset of notes from the chord. The fifth is often omitted. When a guitar is accompanied by a bass, the guitarist may omit the bass note from a chord. As discussed earlier, the third of a triad is doubled to emphasize its major or minor quality; similarly, the third of a seventh is doubled to emphasize its major or minor quality. The most frequent seventh is the dominant seventh; the minor, half-diminished, and major sevenths are also popular.
caption: An approximate "ranking by frequency of the seventh chords in major".[81]
  About this soundPlay V7 (help·info) (Dominant), About this soundii7 (help·info) (Minor), About this soundviiø7 (help·info) (Half-diminished), About this soundIVM7 (help·info) (Major), About this soundvi7 (help·info), About this soundIM7 (help·info), or About this soundiii7 (help·info).
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