Chord sequence

Gbm7, F7, Fbmaj7

G♭m7 F7 F♭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

Gbm7
F7
Fbmaj7

Analysis

Heard in Fb major

Each chord's roman numeral and role in Fb major
Chord	Numeral	Role
G♭m7	ii7	Subdominant
F7	subV7	Tritone substitute for V7
F♭maj7	Imaj7	Tonic

Progressions in these changes

All the chords

Tritone Sub ii-V-I Progression in Fb

The ii-V-I with a tritone substitute: bII7 in place of V7, so the bass falls by half steps from ii to I.

Scales to play