How To Use 7b5 Chords On Guitar

How to Use 7b5 Chords? Guitar Lesson With Shapes and Tabs

Stef Ramin By On 2021-10-12 0

Unlocking that smooth tension and release in jazz harmony is where the magic lies—and the dominant seventh flat-fifth (7♭5) chord is one of your secret weapons.

Imagine sliding into a chord that sounds both unexpected and inevitable, bridging the gap between yellow-and-gold major chords and grey-shaded minor ones. That’s what the 7♭5 chord does.

In this lesson, we’ll dive into what a 7♭5 chord really is (yes, deeper than just “a dominant with a flat fifth”), explore symmetrical voicings that appear in mirror-image positions, and show you how to plug them into classic II-V-I progressions to give them a tasteful twist.

Whether you're comping behind a soloist or crafting chord-melody lines on the neck, you’ll gain the tools to make this altered dominant chord sing.

Basic Interval Formula

A 7♭5 chord is simply a dominant seventh chord (1 - 3 - 5 - ♭7) with the fifth lowered by a semitone (♭5). 

So the formula is:

1 (root)

3 (major third)

♭5 (diminished fifth)

♭7 (minor seventh) 

For example:

C7♭5 → C (1), E (3), G♭ (♭5), B♭ (♭7) 

D7♭5 → D, F♯, A♭, C

C7b5 C G♭ B♭
Formula 1 3 ♭5 ♭7

Dominant 7 and 7♭5 Comparison

As explained above, 7♭5 chords are dominant 7 chords where the 5th is lowered by a semitone providing the formula R - 3 - ♭5 - ♭7.

Here are some basic chord shapes showing how to turn dominant seventh chords into dominant 7 flat fifth (7♭5).

For more chord positions don't hesitate to take a look at this Guitar Chord Dictionary

7b5 guitar chord shapes 1
Dominant 7 flat fifth guitar chord chart 1
7 flat 5 guitar chord diagrams 1

Inverted Chord Shapes / Symmetry

One significant point with 7♭5 chords is that they are symmetrical, indeed there are two chords in one position.

It means that each note is separated by a tritone, an equal division of the octave made of 6 semitones (or 3 whole tones).

As shown in the diagrams below, there is one position for two voicings.

Let's take the first diagram as an example, the one with drop 2 dominant 7♭5 chord with the bass on 6th string.

As you can see the first voicing shape with the black dots (R - ♭5 - ♭7 - 3) is the same as the other one a tritone away (♭5 - R - 3 - ♭7).

The two other blue shapes, 3 - ♭7 - R - ♭5 and ♭7 - 3 - ♭5 - R, are also played the same way.

The principle is the same for any 7♭5 chord position.

Dominant seventh flat fifth guitar chord shapes
7b5 guitar chord charts

Exercises - 2 5 1 Progressions

The basic use of 7♭5 is to substitute them for the V7 chord of a II V I sequence for example, in order to create a smooth transition between the chords. Here are some tabs to illustrate this.

Exercise 1 : In the key of B♭ : Cm7 (ii) | F7 (V) | B♭maj7 (I) becomes : Cm7 | B7♭5 | B♭maj7.

Exercise 2 : Key of D : Em7 (ii) | A7 (V) | Dmaj7 (I) becomes : Em7 | E♭7(b5) | Dmaj7.

Exercise 3 : Key of C : Dm7 (ii) | G7 (V) | Cmaj7 (I) becomes : Dm9 | D♭7(b5) | Cmaj7.

TIP : You can try to replace basic dominant 7 chords by 7♭5 chords in jazz standards or songs you are familiar with.

7b5 guitar chord exercises with tab
7b5 guitar chord exercises with tab 2
7b5 guitar chord exercises with tab 3

Chord Melody Exercise

This short chord-melody exercise in Fmaj illustrates how to use 7♭5 chords to make the link with non-altered chords.

 

7 flat fifth guitar chord melody

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chords chord diagrams chord shapes voicings Altered chords harmony 7b5

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