Chord sequence

Cm7, Db7, Gbmaj7, A7, Dmaj7, F7, Bbmaj7

Cm7 D♭7 G♭maj7 A7 Dmaj7 F7 B♭maj7

Tempo 120 BPM

Rootless Shells Guide tones Rooted shells Rooted Drop 2

Four-note rootless voicings in their two forms, with the 3rd or the 7th on the bottom, played over the root.

Customize each chord

Cm7
Db7
Gbmaj7
A7
Dmaj7
F7
Bbmaj7

Analysis

Heard in Bb major

Each chord's roman numeral and role in Bb major
Chord	Numeral	Role
Cm7	ii7	Subdominant
D♭7	V7/♭VI	Secondary dominant of bVI
G♭maj7	♭VImaj7	Borrowed from Bb minor
A7	V7/III	Secondary dominant of III
Dmaj7	?	Outside the key (IIImaj7)
F7	V7	Dominant
B♭maj7	Imaj7	Tonic

Progressions in these changes

All the chords

Coltrane Changes in Bb

John Coltrane's substitution for a ii-V-I: the music passes through three keys a major third apart, I, bVI and III, each reached by its own dominant, before arriving home.

Scales to play