Chord sequence

Gm7, Gb7, Fm7, E7

Gm7 G♭7 Fm7 E7

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
Gb7
Fm7
E7

Analysis

Heard in Eb major

Each chord's roman numeral and role in Eb major
Chord	Numeral	Role
Gm7	iii7	Diatonic
G♭7	subV7/ii	Tritone substitute for V7/ii
Fm7	ii7	Subdominant
E7	?	Outside the key (bII7)

Progressions in these changes

All the chords

Chromatic iii-bIII-ii-bII Progression in Eb

The iii-VI-ii-V turnaround with both dominants replaced by tritone substitutes, so the roots descend by half steps from iii to I.

Scales to play