The “major” blues scale Some improvisers find it helpful to think of a major blues scale. The difference between a major and minor pentatonic scale is identical to the difference between the major and minor blues scale: the major blues scale is a rotation of the blues scale of its relative minor. Begin the blues scale on me (↓^3)(↓3^)(\downarrow\hat3), and you will get a blues scale for the relative major. These relationships are summarized in Example 5

The Blues Scale

Scales

The expressiveness of the blues comes from the melodic inflections added to particularnotes. When we listen to various vocal or guitar renditions of the blues, these inflectionsare easily recognizable; they stand out because of their emotional charge and slightly “outof tune” sound. 1 The so-called blues scale approximates the sound of these pitchinflections by altering ^3, ^5, and ^7 of the major scale. Figure 9.3 illustrates the content ofthe blues scale and its derivation from the major scale.The blues scale is a six-note collection with the “blue” notes on ≤3, ≤5, and ≤7. Althoughthe presence of ≤7th suggests a chord–scale relationship with the dominant 7th chord,the use of the blues scale is not limited to this chord only. In the context of the bluesscale, the pitches ≤3 and ≤5 constitute expressive embellishments not bound by anyparticular harmonic function or chord type. The blues scale, then, is an androgynous

The progression shown in Figure 9.9 exemplifies the structure of a minor blues.4The chord structure of the minor blues is characterized by the presence of traditionaltonal progressions. For instance, the tonicization of iv in m. 4 uses a secondary dominant7th, V7/iv, and the motion to V 7 in m. 10 is prepared by the ≤VI7 chord. This particularpreparation of the dominant 7th, ≤VI7–V7, is one of the harmonic trademarks of the minorblues.

Having examined the structure of the blues scale, we can now explore the tonal potentialof the scale.2 Figure 9.4 illustrates the structure of G blues scale.This scale has a minor feel to it; notice the use of ≤3, ≤5, and ≤7. By starting the scale onB≤3 and continuing through the octave, we are able to generate a major scale that, inaddition to having the “blue” 3rd, also contains the major 3rd needed for major anddominant 7th chords. A major blues scale, shown in Figure 9.5, starts on ≤3 of the regularblues scale, contains a perfect 5th, major 6th, and major 9th, and establishes a convincingchord–scale relationship with the B≤6/9, B≤13 or other B≤–based dominant 7th chords.In addition to more generic usage of the blues scale (where a single scale is used in thecontext of different chords), we can be more discerning and assign a regular blues scaleto minor chords and a major blues scale to major and dominant 7th chords.

Chapter 9 discusses the most important form in jazz, the blues, examines the structureof the blues scale, and provides chord–scale relationships for the basic and minor bluesprogressions

BLUES MELODIES AND THE BLUES SCALE