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There are also minor twelve-bar blues, such as John Coltrane's "Equinox" and "Mr. P.C.". [10] The chord on the fifth scale degree may be major (V 7 ) or minor (v 7 ). [ 10 ] Major and minor can also be mixed together, a signature characteristic of the music of Charles Brown .
Steedman (1984) [1] has proposed a set of recursive "rewrite rules" which generate all well-formed transformations of jazz, basic I–IV–I–V–I twelve-bar blues chord sequences, and, slightly modified, non-twelve-bar blues I–IV–V sequences ("rhythm changes"). The typical 12-bar blues progression can be notated
Chords with more than three notes include added tone chords, extended chords and tone clusters, which are used in contemporary classical music, jazz and almost any other genre. A series of chords is called a chord progression. [1] One example of a widely used chord progression in Western traditional music and blues is the 12 bar blues progression.
Eight-bar blues: I–V–IV–IV–I–V–I–V: 3: Major Folia: i–V–i– ♭ VII– ♭ III– ♭ VII–i–V–i–V–i– ♭ VII– ♭ III– ♭ VII–i–V–i: 4: Minor Irregular resolution (Type I: Two common tones, two note moves by half step motion) V7–III7: 2: Major Montgomery–Ward bridge: I–IV–ii–V: 4: Major ...
Although there are many possible progressions, in practice, progressions are often limited to a few bars' lengths and certain progressions are favored above others. There is also a certain amount of fashion in which a chord progression is defined (e.g., the 12-bar blues progression) and may even help in defining an entire genre. [citation needed]
However, since blue notes are considered alternative inflections, a blues scale may be considered to not fit the traditional definition of a scale. [6] At its most basic, a single version of this blues scale is commonly used over all changes (or chords) in a twelve-bar blues progression. [7]
"In a blues in A, the turnaround will consist of the chords E 7, D 7, A 7, E 7 [V–IV–I–V]." [ 3 ] [ 4 ] V may be used in the last measure rather than I since, "nearly all blues tunes have more than one chorus (occurrence of the 12-bar progression ), the turnaround (last four bars) usually ends on V, which makes us feel like we need to ...
In a jazz context, when "blues" or "solo on blues" appears at the start of a solo section, it is an abbreviation for "blues progression"; it instructs the performer to improvise solos over a 12-bar blues progression based on I, IV, and V7 chords. The term "blues" also refers to a style of soloing and playing over this type of progression.