Using Quartal Harmony on the guitar is a great way to tap in to the modern jazz chords. In this video I am going to show you how you can use quartal voicings on guitar to get a more modern jazz blues. First going over all the voicings available for each of the chords in the blues chord progression.
The Stacks of fourths are especially connected to way McCoy Tyner played piano with John Coltrane
As a bonus I have also added a few extra turnarounds to explore and see how you might use this in a context with more moving harmony.
The F blues
Since I am using a twelve bar blues in F as an example it might be good to just have that chord progression:
To get started using these chords on a blues in F we need a set of voicings for each of the chords. The F7 chords are found by harmonizing an F mixolydian or Bb major scale in 4ths.
For the middle string set this is shown in example 1:
In the video I also demonstrate how this chords might sound as F voicings over an F pedal.
The general idea is that not all the voicings are complete F7 voicings, but the picture you create by using several voicings will still convey the sound of the F7. The specific sound of these voicings is inn this case also important because the quartal voicings are in themselves a bit unclear.
The next chord is the Bb7 in bar 2. You can construct the chords by harmonizing a Bb mixolydian or Eb major scale in 3 part stacks of 4ths.
The F7 alt voicings are coming out of the F altered or Gb melodic minor scale. In this context the chords all include a lot of notes that are not in the F7 sound. This means that it is somehow easier to hear the F7alt, as you can probably hear in the video.
In the style of jazz that makes extensive use of quartal voicings (mid 60’s and on) it is very common to use the diminished scale on both dim chords and dominant chords. In this case we can use the single stack fourths for the Bdim(b6): B Ab D G. Here the top three notes are a stack of 4ths and we can move that through the scale as shown in example 4:
TheD7alt voicings are coming out of the D altered or Eb melodic minor scale. We can treat these voicings exactly the same as the F7alt chord. This wil get us the chord voicings shown in example 5:
The II chord: Gm7
The cadence in an F Jazz blues is a II V I in F: Gm7 C7 F. The voicings for the Gm7 are found by building stacks of 4ths in an F major scale.
Note that again for the period where these voicings became common it also became much more common to play unclear II chords with a m13 voicing. Usually the II chord was there to suspend the V so the 13 could not be included. From McCoy Tyner and Herbie Hancock on it became quite common to play m13 voicings for the II chord.
You can check out more on m13 chords here: The Minor Chord You Never Use
The dominant is an altered dominant, again to fit the style and sound associated with this sound.
The F blues with Quartal voicings
The 1 chorus example shown below is an F blues played entirely with Stacks of 4ths.
The first chord is a stack of 4ths from Eb that you might recognize as an F13. This is a complete F dominant sound and we start by giving a complete picture of what is being played. From there the chords are walking up through the scale to the same type of chord voicing on Bb7.
In the end of the Bb7 bar the voicing is also moving up step wise and this makes it possible to descend down to an F7 voicing chromatically. From that voicing the melody skips down to again walk up and approach an F7alt voicing. Note that the context makes this clear even though the voicing does not contain an A or an Eb.
Via the F7#9 voicing we can move down a half step to get to the Bb7. With step wise descending movement the melody continues down to a Bdim voicing and repeats this voicing before resolving back up to an F7 voicing. The melody of the F7 and the Am7(b5) are really using the same set of voicings. On the D7alt the chord is an D7(#9) voicing.
Gm7 is played with a Gm13 voicing and the melody can again move up in a step wise motion to reach the C7alt chord. On the C7alt, the chords are encircling the F7 voicing that it resolves to in bar 11.
The turnaround uses this voicing and the D7(#9) voicing, The Gm7 voicing is in fact more of a Gsus4 or Dm7 type voicing but in the context it comes across as a Gm and it makes it possible to move up to the C7 voicings with an ascending half step. As in the cadence the two C7 alt voicings encircle the final F voicing.
A few extra turnarounds
I decided that it might be useful to demonstrate how more dense progressions sound if you go through them only using the quartal voicings.
The first example is starting out in the same way the last part of the blues did. From the D7(#9) voicing I use a vocing that i can move up a whole step to get a Gm13 voicing on the II chord. In this turnaround the C7alt is first a clear C7(#9) and then a stack of 4ths that only contains alterations. Thes alterations can then be resolved a half step down to F7 and I end on the F13 voicing.
In the 2nd turnaround I am now starting on the same F7 but then moving up stepwise on the D7alt. By moving up further it lands on a complete Gm7(11) voicing. The C7alt voicings are also just moving up in scale steps. The line ends with the same voicings of turnaround 1 but an octave higher.
The last turnaround is again starting with the same F6/9 voicing as the previous versions. The D7 alt voicings are now reached by moving to the closest voicing below the F chord. From here the melody continues in steps dwon to Gm13 and continues to the closest C7alt voicings before it resolves to F13.
As you can hear in the examples there is a very charateristic sound to the quartal voicings. When using them in the way that I am doing on the blues in F in this lesson it works really well even if all voicings are complete.
The way you want to work on this is probably to work on your diatonic stacks of 4ths. Then try to comp through progressions you are very familiar. Since you know them you can tell if the solutions you come up with are working in the context.
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Quartal Harmony on a Jazz Blues
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