One of the most powerful tools in jazz, blues, and fusion improvisation is superimposition — playing ideas from one harmonic context over a different chord. The chordtone-sevenths substitution cycle is a systematic way into that world, and once you understand how it works, you’ll start hearing it everywhere from Charlie Parker to Josh Smith, Wes Montgomery to John Mayer.
What you’ll get out of this lesson: A clear understanding of how to build seventh chords off the chord tones of any dominant chord, and how to use the resulting cycle of four chord types — major 7, minor 7, dominant 7, and half-diminished — as a framework for superimposition. You’ll also see how to extend this into more advanced outside sounds once the basics are solid.
What the chordtone-sevenths cycle actually is
The concept is straightforward: take a chord, identify its chord tones, then build seventh chords off each of those tones using only the notes available in the diatonic scale. Let’s use G7 as the example. G7 contains G, B, D, and F. The diatonic scale for G7 is G Mixolydian: G A B C D E F. Building seventh chords from each chord tone using only those notes gives us:
- G7 — G B D F
- Bm7b5 — B D F A
- Dm7 — D F A C
- Fmaj7 — F A C E
Notice something important: as you move up through the list, you leave the original G triad behind and pick up extensions. Bm7b5 adds the 9th (A). Dm7 adds the 9th and 11th. Fmaj7 has none of G, B, or D — it’s pure extensions: b7, 9, 11, 13. This means playing Fmaj7 over G7 gives you a very outside, tension-filled sound, while playing Bm7b5 is a mild extension. Learning to hear and control that tension is the real skill here.
The cycle — four chords that cover all of music
What makes this so useful is that the four chord types produced — dominant 7, half-diminished (m7b5), minor 7, and major 7 — are the four most common chord types in all of music. And because they form a cycle, any time you have one of them, you can access any of the others as a substitution, as long as you know the relationships. The diagram below shows all the substitutions as they relate to each other.
This is how Wes Montgomery and Pat Martino would “minorize” a G7 — they’d relate it to D minor (the Dorian sound a fifth up) and use their minor vocabulary there. Because they knew this cycle, they also knew when to use the half-diminished sound, the major 7 sound, and so on. They understood the distance between each point in the circle.
The substitution cheat sheet
Here is a summary of the most common substitutions from the cycle:
For Dominant Chords:
- min7b5 / Locrian from the 3rd
- minor7 / Dorian from the 5th
- Maj7 / Lydian from the b7th
For m7b5 Chords:
- minor7 / Dorian from the b3rd
- Maj7 / Lydian from the b5
- Dom7 / Mixolydian from the b13th
For Major Chords:
- Dom7 / Mixolydian from the 2nd
- min7b5 / Locrian from the #11th
- minor7 / Dorian from the 6th
For Minor Chords:
- Maj7 / Lydian from the b3rd
- Dom7 / Mixolydian from the 4th
- m7b5 / Locrian from the 6th
The cool thing about this cycle is that any time you have one of those chords, you can go to this cycle and use any of the other chords, as long as you get the relationships right.
Advanced extensions: going two degrees of separation
Once the basic substitutions are solid, you can go further. The substitutions can act as a springboard: move to a substitute chord, and then apply the advanced scale or arpeggio options available for that substitute. For example, over G7, play D Dorian (minor7 from the 5th) — that’s already inside. But then, within your D minor repertoire, you could draw on C melodic minor, C harmonic minor, C minor pentatonic, or any arpeggio from that family. This is “twice removed” superimposition, and it’s how players like Pat Martino get those wide, outside sounds without losing the thread of the harmony.
Advanced scale choices for each chord type:
- Dominant: Major Pentatonic, Bebop dominant, Altered, Lydian dominant, Whole-tone, Dominant Diminished
- m7b5: Locrian nat2, Locrian nat6, Blues scale, Minor Pentatonic
- Minor: Harmonic Minor, Blues scale, Melodic Minor, Natural Minor, Hungarian minor, Minor bebop
- Maj7: Lydian augmented, Lydian augmented #2, Major bebop
Remember: the more advanced and outside you take it, the more important it becomes to be able to resolve your lines back to the chord.
Taking it further: Work through each chord type — not just dominant — and learn what each substitution sounds like relative to the home chord. The diagram above maps it all out, but the real work is getting those sounds into your ears by playing them over backing tracks. Start with diatonic substitutions before adding the advanced scale options.
Your homework: Put on a G7 backing track. For ten minutes, practise arpeggiation using only the Bm7b5 arpeggio, then the Dm7 arpeggio, then the Fmaj7 arpeggio — one at a time, resolving each back to G. Focus on hearing what each one gives you harmonically. Once you can hear the difference clearly, try linking two of them in a single phrase.