the Herbie Hancock school · ii–V–I in B♭ major
Upper-Structure Triads in B♭ Major
The audio adds each chord's root in the bass — that's the context these rootless shapes are designed to sit in. The MIDI file is exactly the notation.
The notes
| Chord | Notes (low → high) | Formula |
|---|---|---|
| Cm11 | E♭ – B♭ – B♭ – D – F | ♭3 · ♭7 · ♭7 · 9 · 11 |
| F7(♯9♭13) | E♭ – A – D♭ – F – A♭ | ♭7 · 3 · ♭13 · root · ♯9 |
| B♭maj9 | D – A – F – A – C | 3 · 7 · 5 · 7 · 9 |
Why it works
From Cm11 to F7(♯9♭13), 4 voices move (B♭3→A3, B♭4→D♭5, D5→F5, F5→A♭5) against 1 held tone. Into B♭maj9, 4 voices settle by step or small leap (total motion of just 25 semitones). Smoothness here is measurable, not a metaphor.
In B♭ major, 6 of the 15 notes fall on black keys — a mixed terrain that is exactly why this progression must be practiced in every key, not just C. The lowest note is D3 in the octave below middle C; below roughly C3, close intervals start to blur, and this voicing stays clear of that line.
Practice tip: play the progression rubato first and listen for the held tones, then put the metronome on 2 and 4 at a slow tempo. When the grab is automatic, move around the circle of fourths — you are coming from F and headed to E♭. Say the chord symbols out loud as you play; naming and hearing are different skills, and you want both.
Where B♭ major lives in the repertoire
B♭ major is the horn key: rhythm changes ("I Got Rhythm" and its hundred contrafacts) live here, and so does a large share of the blues repertoire. A jobbing pianist probably plays more ii–V–Is in B♭ than in any key except E♭ — this page is core curriculum, not a variation.
About this voicing style
A plain major triad stacked over the guide tones — simple triad, sophisticated colour. Read the full story and get it in all 12 keys →
Listen: Herbie Hancock behind Miles and on "Maiden Voyage"; McCoy Tyner's right-hand triads; Bill Dobbins' pedagogy.
Around the circle
Practice keys in the order bassists walk them — up a fourth: ← F · B♭ · E♭ →