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In jazz theory, an avoid note is a scale degree which is considered especially dissonant relative to the harmony implied by the root chord, and is thus better avoided. In major-key tonality the avoid note is the fourth diatonic scale step , or 11th, which is a minor ninth above the 3rd of the chord, and thus very harsh. [ 1 ]
An avoid note is a note in a jazz scale that is considered, in jazz theory and practice, too dissonant to be emphasised against the underlying chord, and so is either avoided, used as a passing tone or chromatically altered. [3]
Example 1: Below, a common voicing used by jazz pianists is given for the chord C 7 ♯ 9 (C major chord with a minor 7th, and extended with an augmented 9th). In the lower stave the notes E ♮ and B ♭ are given. These form a tritone which defines the dominant sound, and are the major 3rd and minor 7th of the C 7 ♯ 9 chord.
An altered note is a note which is a deviation from the canonical chord tone. [citation needed] There is variety in the chord symbols used in jazz notation. A jazz musician must have facility in the alternate notation styles which are used. The following chord symbol examples use C as a root tone for example purposes.
The scales commonly used today consist of the seven modes of the diatonic scale, the seven modes of the melodic minor scale, the diminished scales, the whole-tone scale, and pentatonic and bebop scales. [7] In the example below featuring C 7 ♯ 11 and C lydian dominant every note of the scale may be considered a chord tone [7] while in the ...
The term side-slipping or side-stepping has been used to describe several similar yet distinct methods of playing outside. In one version, one plays only the five "'wrong'" non-scale notes for the given chord and none of the seven scale or three to four chord tones, given that there are twelve notes in the equal tempered scale and heptatonic scales are generally used. [3]
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For example, if a seventh chord, such as G 7, appears in a lead sheet or fake book, many chord-playing performers add the ninth, thirteenth or other notes to the chord, even though the lead sheet does not specify these additional notes. Jazz players can add these additional, upper notes because they can create an important part of the jazz sound.