What Scale to Play Over 7b9 Chord

Phrygian dominant scale guitar shapesDominant 7 flat ninth chords (7b9) are generally related to the fifth mode of the harmonic minor scale known as Phrygian dominant scale, which makes it the most obvious choice for improvising over 7b9 chords. However, we will see in this article that there are many other options.

Dominant 7b9 Chord Construction

First, you need to know how 7b9 chords are built :

  • 1 (root)
  • 3 (major third)
  • 5 (perfect fifth)
  • b7 (minor seventh)
  • b9 (minor ninth)

They can be seen as dominant 7 chords with a b9. You will find below some basic guitar posistions. For more complex 7b9 chord shapes please follow this link.

Scales That Sound Good Over 7b9 Chords

The Phrygian Dominant Scale

As mentioned before the first scale choice for playing over 7b9 is surely the Phrygian dominant scale, which is actually the fifth mode of the harmonic minor scale. It can be seen as the Mixolydian scale with a lowered 9 (2) and lowered 13th (6) or the Phrygian mode with a major third instead of a minor third (b3). The formula for the Phrygian dominant scale is 1 - b2 (b9) - 3 - 4 (11) - 5 - b6 (b13) - b7.

Other Names for the Phrygian Dominant Scale

  • Phrygian major
  • Altered Phrygian
  • Dominant flat 2 flat 6
  • Spanish Gitan
  • Jewish
  • Spanish Gipsy 

Phrygian Dominant Guitar Shapes

The Mixolydian b2 scale

The Mixolydian b2 scale is the mode V of the harmonic major scale. The interval pattern is 1 - b2 (b9) - 3 - 4 (11)- 5 - 6 (13) - b7. In comparison with the  Phrygian dominant scale, the Mixolydian b2 scale as a natural 13, it should be used with caution, depending on the chord function.
 

Other Names for the Phrygian Dominant Scale

  • Dominant b2
  • Mixolydian b

Mixolydian b2 Chord Shapes

The Half-whole Diminished Scale

The half-whole diminished scale or dominant diminished scale is a symmetric scale built by alternating half-steps and whole-steps. It is important not to confuse it with the whole-half diminished scale which is the opposite. The formula is 1 - b9 -#9 -3 - #11 (or b5) - 5 - 13 (6) - b7
 

The half-whole diminished scale is widely used for soloing over dominant 7th chords, and especially on 7b9 chords. It can bring interesting tensions to your lines by highlighting the #9 and #11 in addition to the b9.
 

Half-whole Diminished Chord Shapes

The Dorian b2 Pentatonic Scale

The next two options for playing over 7b9 chords are pentatonic scales. The formula is root (1) - minor second (b2) - fourth (4) - fifth (5)  and minor seventh (b7). It works perfectly over 7b9 chords.

The Altered Pentatonic Scale

The altered scale is also known as 7b9 pentatonic scale. It is spelled : root (1), minor second (b2) or flat 9 (b9), major third (3), fifth (5) and minor seventh (b7). This is the Phrygian dominant scale without the fourth (4) and the minor sixth (b6).
 

Altered Pentatonic Scale Guitar Shapes

Diminished 7 Arpeggio

Playing a diminished 7 arpeggio (1 - b3 - b5 - bb7) starting on the third of a dominant 7 chord is common trick used by many jazz musicians to highlight the b9. Example with G7b9 (G - B - D - F - Ab) just play  B - D - F - Ab.

 

  • 40 II V I Jazz Guitar Licks NEW

    This pdf method for guitar contains 40 II V I jazz guitar lines with tab, standard notation, analysis, scale charts and audio files.
  • 40 Minor (Dorian) Jazz Guitar NEW

    This printable guitar method in PDF format contains 40 easy minor jazz guitar lines based on the Dorian mode for building effective improvised solos.
  • 101 Dominant Arpeggio Patterns

    This printable PDF method provides 101 dominant arpeggio exercises with tab, theory and standard notation for the jazz, blues and rock guitarist.
  • 40 Major Jazz Guitar Licks

    Printable PDF eBook method containing 40 major jazz guitar licks with tab, standard notation and audio files for beginners and intermediates.
  • 49 Essential Jazz Lines

    This printable eBook method in PDF format provides 49 jazz solo transcriptions of the greatest jazz musicians of all times with TABS, standard notation, audio files and analysis both for guitar teachers and students.
  • Mastering Pentatonic Scales

    This jazz guitar method is an eBook available as a PDF with standard notation, guitar tabs, diagrams, analysis, audio files and backing tracks. You will find in this booklet 25 easy jazz guitar lines with theory using common and rare pentatonic scales.
  • 50 II-V-I voicings

    This guitar method is a printable PDF eBook contains 50 exercises with audio files, analysis, tab & standard notation on how to play over II-V-I chord progressions using different kind of voicings.
  • 11 blues jazz studies

    This PDF method contains 11 guitar lessons with chord studies, tabs, standard notation, analysis & audio files about the main blues progressions used in jazz music.
  • Mastering the altered scale

    This PDF eBook method contains 25 altered jazz guitar licks with tabs, patterns, scale charts and audio files to master, apply and develop the altered scale.
  • 40 Blues Dominant patterns

    This printable method is available as a PDF file containing 40 easy dominant jazz-blues guitar lines with tabs, standard notation, analysis, audio files and scale charts.
  • 25 Soul Jazz Guitar Licks

    You will find here an eBook available in PDF containing 25 soul jazz and hard bop guitar licks in the style of Grant Green, Melvin Sparks, George Benson. These jazz lines come with tabs, standard notation, guitar neck diagrams, backing track for practice and 25 audio files for each riff.
  • 25 Diminished Patterns

    This eBook PDF with audio files contains 25 dominant diminished jazz guitar patterns using the half-whole diminished scale and diminished 7th arpeggios.
  • 6 Tritone substitution licks

    The tritone substitution is explained through 6 jazz guitar licks with tabs/notation, youtube video links. Printable PDF eBook.

guitar scales chords Theory