Chord sequence

Ab7, Db7, Ab7, Db7, Ab7, Bbm7, A7, Ab7, A7

A♭7 D♭7 A♭7 D♭7 A♭7 B♭m7 A7 A♭7 A7

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

Ab7
Db7
Ab7
Db7
Ab7
Bbm7
A7
Ab7
A7

Analysis

Heard in Ab major

Each chord's roman numeral and role in Ab major
Chord	Numeral	Role
A♭7	V7/IV	Secondary dominant of IV
D♭7	IV7	Blues dominant
A♭7	V7/IV	Secondary dominant of IV
D♭7	IV7	Blues dominant
A♭7	I7	Blues dominant
B♭m7	ii7	Subdominant
A7	subV7	Tritone substitute for V7
A♭7	I7	Blues dominant
A7	subV7	Tritone substitute for V7

Scales to play