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Box Voicings
A structured left-hand jazz comping system. Two box positions — 6 chord types each, 60 voicings total. Select a root, pick a box, and see every chord type spelled out on the staff and keyboard.
Root note
Box
Clef
Box I clusters your left hand around the F–A–B–E group. One physical hand position serves six different chord types — the same keys carry a different harmonic meaning depending on context. All six voicings share the same interval shape [0, 4, 6, 11] from different anchors (except sus, which uses [0, 2, 3, 7]).
The workhorse left-hand voicing. Contains the 9th and 13th for a full, extended sound. Use on any dominant chord in a ii–V–I.
Maximum tension before resolution. Packs the 3rd, b13, b7, and #9 into a tight cluster — the altered scale in four notes.
Suspended dominant with a flat 9. Creates a floating, unresolved quality — neither major nor minor. Common in modal jazz.
Lydian sound. The raised 11th (tritone above root) gives a luminous, floating quality. Use as a I chord or on IV in a major key.
Rich, complete minor tonic voicing. The natural 6th and 9th replace the b7 for a brighter, less dark sound. Common in ballads.
Half-diminished chord — the ii chord in a minor ii–V–I. Same physical cluster as the dominant 7th voicing, reinterpreted.
How to Practice Box Voicings
- Start with Box I Dominant 7th in all 12 keys until it's automatic.
- Then learn Box II Dominant 7th — same pitches, different hand position.
- Gradually expand to all 6 chord types within one box before switching to the other.
- Practice playing a ii–V–I using the same box: Bm7♭5 → E7 → Am6/9 all in Box I.
- The bass clef staff shows exactly where these notes sit in left-hand register. Switch to treble clef to see the notation as it would appear in a lead sheet.
Why This Works
Box I and Box II each contain four pitch classes — but those same four notes function as different scale degrees depending on which note you treat as the root. For instance, in the key of G: the notes F–A–B–E are the b7–9–3–13 of G7, the 1–3–♯11–7 of Fmaj7, the b3–5–6–9 of Dm, and the b5–b7–1–11 of Bm7♭5. That's four chord types with one hand position. With both boxes across all 12 keys, the system yields 60 distinct voicings.