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Rootless Piano Voicings
Four fixed left-hand shapes — The FABE Voicing, The BEFA Voicing, The A♭BDG Voicing, and The E♭GBD Voicing (Box V) — that each function as multiple chords depending on what the bass plays underneath. Every voicing is rootless: the pianist plays the upper structure, the bassist (or your left-hand thumb) plays the root. Also known in jazz pedagogy as Type A / Position A box voicings.
The FABE Voicing
Treble-register four-note shape (F–A–B–E). Twelve chord interpretations depending on the bass.
The BEFA Voicing
Bass-register cluster (B–E–F–A). Same four pitch classes as FABE, dropped an octave.
The A♭BDG Voicing
Diminished-family shape (A♭–B–D–G). Eight chord interpretations: four dom7♭9 + four dim7.
The E♭GBD Voicing
Augmented major 7 shape (E♭–G–B–D), known pedagogically as Box V. Six chord interpretations covering Lydian dominant, melodic minor, and altered sounds.
How These Voicings Work
Each voicing is a single fixed hand shape — four pitch classes you don't move — that re-interprets itself as a different chord every time the bass changes. You memorize one shape, and you can comp through dozens of harmonic situations without ever changing voicing.
All four voicings are rootless. The root is never inside the shape — it's implied by the bass note. That's what frees the upper structure to mean different things in different contexts. The FABE and BEFA voicings share the same four pitch classes (F, A, B, E) in two registers, and cover six of the seven modes plus Lydian Dominant and Altered Scale. The A♭BDG voicing (A♭, B, D, G) covers the Diminished Scale family — eight chord interpretations from a single shape. The E♭GBD voicing (Box V) is the augmented major 7 shape (1–3–♯5–7) — a melodic-minor sound that yields six interpretations including Lydian dominant, m(maj7), and altered chords.
Bass note (FABE & BEFA voicings)
Bass clef
12 Chord Interpretations
Same four pitch classes — twelve different chords depending on what the bass plays. Click a row to set the bass note.
| # | Bass | Chord | Voicing formula |
|---|---|---|---|
| 1 | C | Cmaj7 | 11 · 13 · 7 · 3 |
| 2 | D♭ | D♭7alt | 3 · ♭13 · ♭7 · ♯9 |
| 3 | D | Dm6/9 | ♭3 · 5 · 13 · 9 |
| 4 | E♭ | E♭7alt | 9 · ♯11 · ♭13 · ♭9 |
| 5 | E | Esus(♭9) | ♭9 · 11 · 5 · 1 |
| 6 | F | Fmaj7♯11 | 1 · 3 · ♯11 · 7 |
| 7 | G♭ | G♭m(maj7) | 7 · ♭3 · 11 · ♭7 |
| 8 | G | G7 | ♭7 · 9 · 3 · 13 |
| 9 | A♭ | A♭7alt | 13 · ♭9 · ♯9 · ♭13 |
| 10 | A | A9 | ♭13 · 1 · 9 · 5 |
| 11 | B♭ | B♭maj7 | 5 · 7 · ♭9 · ♯11 |
| 12 | B | Bm7♭5 | ♯11 · ♭7 · 1 · 11 |
Bass clef
12 Chord Interpretations
Same four pitch classes — twelve different chords depending on what the bass plays. Click a row to set the bass note.
| # | Bass | Chord | Voicing formula |
|---|---|---|---|
| 1 | C | Cmaj7 | 7 · 3 · 11 · 13 |
| 2 | D♭ | D♭7alt | ♭7 · ♯9 · 3 · ♭13 |
| 3 | D | Dm6/9 | 13 · 9 · ♭3 · 5 |
| 4 | E♭ | E♭7alt | ♭13 · ♭9 · 9 · ♯11 |
| 5 | E | Esus(♭9) | 5 · 1 · ♭9 · 11 |
| 6 | F | Fmaj7♯11 | ♯11 · 7 · 1 · 3 |
| 7 | G♭ | G♭m(maj7) | 11 · ♭7 · 7 · ♭3 |
| 8 | G | G7 | 3 · 13 · ♭7 · 9 |
| 9 | A♭ | A♭7alt | ♯9 · ♭13 · 13 · ♭9 |
| 10 | A | A9 | 9 · 5 · ♭13 · 1 |
| 11 | B♭ | B♭maj7 | ♭9 · ♯11 · 5 · 7 |
| 12 | B | Bm7♭5 | 1 · 11 · ♯11 · ♭7 |
Bass clef
8 Chord Interpretations
The upper structure of a Dom7♭9 chord is a diminished 7th. So one shape unlocks four dominants (a minor-third cycle: G7, B♭7, D♭7, E7) and four diminished chords (A♭°7, B°7, D°7, F°7 — with G acting as the added tension).
| # | Chord | Voicing formula |
|---|---|---|
| Dominant 7♭9 family | ||
| 1 | G7♭9 | ♭9 · 3 · 5 · 1 |
| 2 | B♭7 13/9 | ♭7 · ♭9 · 3 · 13 |
| 3 | D♭7♯11♭9 | 5 · ♭7 · ♭9 · ♯11 |
| 4 | E7♯9 | 3 · 5 · ♭7 · ♯9 |
| Diminished 7th family (G as added tension) | ||
| 5 | A♭°7 (add G) | 1 · ♭3 · ♭5 · (T) |
| 6 | B°7 (add G) | ♭♭7 · 1 · ♭3 · (T) |
| 7 | D°7 (add G) | ♭5 · ♭♭7 · 1 · (T) |
| 8 | F°7 (add G) | ♭3 · ♭5 · ♭♭7 · (T) |
Operating rule: Diminished Scale → Dom7♭9 (start on the ♭9) or Dim 7th (start on the root).
Learn more about The A♭BDG Voicing →Bass clef
6 Chord Interpretations
The augmented major 7 shape (1–3–♯5–7) reinterprets as six different chords depending on what bass note sits underneath. The chord-tone column is the universal Box V label — the role E♭ (the shape's lowest note) plays inside that chord.
| # | Bass | Chord | E♭ is | Voicing formula |
|---|---|---|---|---|
| 1 | F | F7♯11 | ♭7 | ♭7 · 9 · ♯11 · 13 |
| 2 | B | B7alt (♭13, ♯9) | 3 | 3 · ♭13 · 1 · ♯9 |
| 3 | D | D7sus(♭9, 13) | ♭9 | ♭9 · 11 · 13 · 1 |
| 4 | A♭ | A♭9 | ♭5 | ♭5 · ♭7 · 9 · 11 |
| 5 | C | Cm(maj7) | ♭3 | ♭3 · 5 · 7 · 9 |
| 6 | E♭ | E♭∆(♯5) | 1 | 1 · 3 · ♯5 · 7 |
FABE & BEFA — Same Notes, Two Registers
The FABE and BEFA voicings are built from the same four pitch classes — F, A, B, and E. In FABE, you voice them as F–A–B–E from the bottom (treble-leaning). In BEFA, the cluster drops an octave and you voice them as B–E–F–A (bass-leaning). Because the four notes stay constant, your hand position never changes — only the bass note (played by the bassist or your left-hand thumb) determines what chord you're hearing. For example: add a G in the bass and you have G7 (F=♭7, A=9, B=3, E=13); add an F and you have Fmaj7♯11 (F=1, A=3, B=♯11, E=7). Both voicings are rootless — you never play the root yourself.
Further Reading
These voicings come from a jazz piano tradition popularized by Bill Evans. Read our deep-dive on how Evans developed the rootless voicing approach that became the foundation of modern jazz piano comping.