Jazz Guitar Upper Structures: How Shell Voicings Become Rootless Upper-Structure Voicings
Upper structures are not a separate, advanced topic you bolt on later — they grow directly out of the shell voicings you already know. Take a shell voicing built from the root, 3rd, and 7th; drop the root; keep the guide tones (3rd and 7th); then add the one or two tensions sitting around them. What you are now playing is an upper structure, a rootless voicing with voice-leading built in. VoiceLid Jazz Guitar founder Junewon Choi, a Berklee-trained guitarist, teaches this in his online jazz guitar lessons because it dissolves the artificial wall between "shell voicings" and "upper structures": they are the same idea at two stages of development. Pianists have organized it this way for decades — which is exactly why the concept transfers so cleanly to guitar.
Why does dropping the root create an upper structure?
A shell voicing's job is to state harmony with the bare essentials: root for grounding, plus the 3rd and 7th guide tones that define the chord quality. Once a bass player or your own bass note covers the root, you no longer need it in the voicing. Removing it frees your hand to add color above the guide tones — a 9, an 11, a 13. The guide tones stay as the structural anchor; the tensions become an upper triad floating over them. This is also why upper-structure playing already contains its own voice leading: you are moving the same inner lines you'd move with shells, just with extra notes riding on top.
Where did rootless upper-structure voicings come from?
This is not a modern invention. The lineage runs straight through bebop-era piano:
Bud Powell is closer to the shell-style, guide-tone approach.
Bill Evans is the touchstone for rootless voicings — root removed, tensions stacked, voice leading immaculate.
Wynton Kelly sits in the same conversation of voicing-led playing.
Guitarists benefit enormously from copying this piano vocabulary one tune at a time. If you want the full, structured map of how guide tones expand into tensions and upper structures across chord types, the Bridge Series lays it out as a daily practice path.
How do I practice turning voicings into lines?
The goal is to make voicings generative, not static. Try this:
Play a rootless voicing and identify its 3rd and 7th plus the one or two tensions around them.
Unfold those notes one at a time — that arpeggiation is already a line.
Fill the gaps between voicing tones with scale steps from the key, alternating and reordering until it sounds melodic.
Move the whole shape up an octave; the structure is identical, so your vocabulary doubles.
Copy one full chorus of a Bill Evans voicing or solo and find where the upper structures actually occur in the music.
For the foundational version of this — playing roots out and letting shell voicings carry the voice leading — read Stop Playing Roots: The Power of Shell Voicings.
What ultimately decides which voicing to use?
Melody. This is the part players miss when they drill voicings in twelve keys without context. Why a shell here and an upper structure there? Because at that exact moment the melody note you're harmonizing sounds best supported one specific way. As you voice-lead through a tune, sometimes a shell is right, sometimes an upper structure is prettier, sometimes a drop 2 fits the line — and the melody decides each time. Charlie Parker's bebop language and the way Thelonious Monk wrote upper structures into his compositions both come back to this melodic logic. For a worked example on a standard, see Upper Structure Triads & Superimposition in "The Girl from Ipanema".
Where does this lead?
Once you hear upper structures as rootless extensions of shells, the sound of players like Wes Montgomery and George Benson stops being mysterious — it's voice-leading and tension placement you can map. To hear how that vocabulary lives in a real player's fretboard logic, study Wes' Insight.
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