Chord Types and Symbols |
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Here is a table showing the common chords and their associated chord symbols as they might appear above the melody in a song- or fake-book, or in guitar tablature. See below for examples and an explanation of how chords are formed. |
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How Chords are Formed and Named |
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Chords are three or more notes sounded together. It's important to have an understanding of chord types because they form the harmonic structure of a composition. For the songwriter, composer or improviser they are the essential tools for building your work. A simple three-note chord is called a triad; formed by combining the first, third and fifth notes of a scale. The name of the chord is based on this first note or root. When this note is the bottom or bass note the triad is in 'root position'; when the third is in the bass the chord is in the 'first inversion'; when the fifth is the bass note the chord is in 'second inversion'. |
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When the seventh note of a scale is added to a triad the result is called a seventh chord and a 7 is placed after the chord name; thus a C Major triad (CEG) becomes a C Major 7 (CEGB). If sixth, ninth or eleventh scale tones are added to the triad this is also reflected in the name of the chord. When only a number 7, 9, etc. appears after the chord name it is assumed that the basic four note chord is a dominant seventh chord, i.e. the seventh note of the scale is flatted. Thus C7 is CEGBb, and C9 is CEGBbD. Often the composer will omit a chord tone, but the chord symbol (which indicates the basic harmonic structure) will remain unchanged. |
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When 'dim' or 'o'(diminished) appears after the chord name both the third and fifth are lowered one half-step. Cdim or Co is formed CEbGb. The scale to accompany a diminished chord is formed by alternating half-steps and whole steps. This is called the diminished scale (CDEbFGbAbABC). In modern usage 'sus' (suspended) refers to a chord in which the fourth has been substituted for the third. Csus or Csus4 is formed CFG. |
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Website © 2008-2020 by James Sivard |
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