Gb7, Cb7, Gb7, Cb7, Gb7, Gdim7, Abm7, Db7, Gb7, Db7 in Gb

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

Analysis

Heard in Gb major

Each chord's roman numeral and role in Gb major
Chord	Numeral	Role
G♭7	V7/IV	Secondary dominant of IV
C♭7	IV7	Blues dominant
G♭7	V7/IV	Secondary dominant of IV
C♭7	IV7	Blues dominant
G♭7	I7	Blues dominant
Gdim7	♯i°7	Passing diminished, rising to ii
A♭m7	ii7	Subdominant
D♭7	V7	Dominant
G♭7	I7	Blues dominant
D♭7	V7	Dominant