Chord sequence

Gm7, C7, Fm7, Bb7, Ebm7, Ab7, Bbmaj7

Gm7 C7 Fm7 B♭7 E♭m7 A♭7 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

Gm7
C7
Fm7
Bb7
Ebm7
Ab7
Bbmaj7

Analysis

Heard in Bb major

Each chord's roman numeral and role in Bb major
Chord	Numeral	Role
Gm7	vi7	Diatonic
C7	V7/v	Secondary dominant of v
Fm7	ii7/iv	ii of the ii-V to iv
B♭7	V7/iv	Secondary dominant of iv
E♭m7	iv7	Borrowed from Bb minor
A♭7	♭VII7	Borrowed from Bb minor
B♭maj7	Imaj7	Tonic

Progressions in these changes

All the chords

Whole-Step ii-V Chain in Bb

Three ii-Vs, each a whole step below the last and the last one the backdoor ii-V: a chain of keys that doesn't arrive until the end.

Scales to play