With Upper-Structure Triads by Harmonizing the MelodyHow to Solo
Upper-structure triads let you solo by harmonizing the melody first and then playing the triad that sits on top of each chord. They are not random color tones you sprinkle on — they come out of the chord-melody you have already built. This is one of the most misunderstood techniques in jazz, and it is central to the advanced work in my online jazz guitar lessons at VoiceLid Jazz Guitar. The path is always the same: take the tune's melody, harmonize it into a chord-melody, find the rootless voicing on each chord, and the triad living on top of that voicing becomes your soloing material. Junewon Choi teaches this as a continuous chain, not four separate skills.
Where do upper-structure triads actually come from?
They come from rootless shell voicings. Start with a shell voicing — root, 3rd, 7th — then drop the root and keep the guide tones. Stack the available tensions on top and you get a triad. Over Bb7, for example, a G major triad sits on top and gives you the flat-9 and natural-13 sound. Over F7, the upper structure is a Dm or Fm shape. The triad is not arbitrary; it is whatever lands on the guide tones plus the right tensions. For the complete map of how these voicings connect to chord function, the Bridge Series walks through it explicitly.
How does the melody decide which triad to play?
This is the step most players skip. Before you improvise, you harmonize the actual melody of the tune into a chord-melody. The melody note becomes the top of each voicing, which fixes the tension — and the tension determines the triad. Take Stella by Starlight. Victor Young's original opening is two bars of a tonic diminished, not the ii–V that Miles Davis popularized. Over that Bbdim tonic, an A major triad sits beautifully, and you can solo with it. The melody told you which triad was available — you didn't guess.
What's the step-by-step process?
Step 1: Learn the melody by ear, in position.
Step 2: Harmonize it into a chord-melody so each melody note has a voicing under it.
Step 3: Reduce each voicing to guide tones (rootless shell).
Step 4: Identify the triad sitting on top of those guide tones plus tensions.
Step 5: Improvise using those triads, letting the melody stay audible.
For a deeper look at the superimposition logic behind these triads, see Upper Structure Triads & Superimposition. And because this whole approach grows out of chord-melody, Voice Leading on Complex Tunes: Getting Information from Chord Melody — which also uses Stella by Starlight — is essential companion reading.
How does this relate to the Wes Montgomery sound?
Wes Montgomery, Russell Malone, and George Benson all kept the tune's melody audible inside their lines — they weren't running scales, they were ornamenting a melody with the harmony stacked above it. A useful drill: play a Wes line over a chord, then drop a melody note into that line an octave below, and let the voice leading carry you to the next chord. The triads and the melody fuse. That is the difference between notes that fit the changes and lines that actually sing.
To hear how Wes built his fretboard logic around exactly this kind of melodic, harmony-rich phrasing, Wes' Insight breaks it down lesson by lesson.
Where does the "altered" sound fit into this?
The altered dominant sound is just another upper-structure triad — specifically, a triad built a half-step above the dominant's root. Over G7 altered, play an Ab minor triad and you instantly get the b9, #9, and #5 colors that define the altered sound. It is the same logic as everything above: a triad sitting on top of guide tones, chosen because the surrounding melody and harmony make those tensions correct. Two things worth remembering:
Altered tensions belong to dominant function, especially secondary dominants resolving by a fifth — there the "out" notes are actually the in-key notes.
Not every voice moves the same direction when an altered chord resolves to a major target; expect contrary motion as one inner voice rises against another falling.
Once you see altered chords as half-step triads rather than a separate seven-note scale to memorize, the whole vocabulary collapses into the same chord-melody-to-triad system you already know.
About the Author
Junewon Choi is a Berklee-trained jazz guitarist and the founder of VoiceLid Jazz Guitar, an online education platform teaching jazz harmony and improvisation through the Functional Diagonal Approach (FDA) — a chord-first method built on voice-leading rather than scale boxes.
Wes' Insight — Wes Montgomery's fretboard logic, in lesson form
Fundamental 1: Wes Diagonal System — the FDA from the ground up