triad

6/9 Chords

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The 6/9 chord is a pentad in which a major triad is extended with a sixth and 9th above the root, but no seventh, thus: C6/9 is C,E,G,A,D. It is not a tense chord requiring resolution and is considered a substitute for the tonic in jazz. Its constituent notes are those of the pentatonic scale.

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Tonic

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The tonic is the first scale degree of a diatonic scale (for example, the major scale, is a diatonic scale). Sometimes it’s called the 1st… Read More »Tonic

Major Ninth Chords

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A dominant ninth is a dominant chord with a ninth, but that’s not what a major ninth chord is. The major ninth chord (or just ninth chord), as an extended chord, typically includes the seventh and ninth along with the basic triad structure. Thus, a Cmaj9 consists of C E G B and D . When the symbol “9” is not preceded by the word “major” or “maj”, the implied seventh is a dominant seventh—e.g. a C9 consists of C E G B♭ and D.

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Sixth Chord Shapes

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A sixth chord is any triad with an added sixth above the root.   For example, a major sixth chord built on C (denoted by C6, or CM6) consists of the notes C, E, G, and the added major sixth.  Here are the 5 shapes for the sixth chord found in the open position.  Other sixth chords (such as F6 and B6) can only be played by using a barred form of one of these 5 shapes.Read More »Sixth Chord Shapes

Minor 6th Chords

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The minor 6th chord is also know as the minor major sixth.  It’s the same as the major 6th chord except the minor triad is used.  It’s a very jazzy chord and can substitute for a minor chord. Here are it’s open position shapes.Read More »Minor 6th Chords

Diminished 7th Chords

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In most sheet music books, Cdim or C° denotes a diminished seventh chord with root C.  Some modern jazz books and some music theory literature use  Cdim or C°  to denotes  diminished  chord, while Cdim7 or C°7 denotes a diminished seventh chord.

A diminished 7th chord is comprised of a diminished triad ( is a triad consisting of two minor thirds above the root) plus a double flattend 7th (same note as the 6th). It’s primary use is  to lead to the tonic, or root note of the song.

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