Chord sequence

Db7, Gb7, Db7, Gb7, Db7, Ab7, Gb7, Db7, D7

D♭7 G♭7 D♭7 G♭7 D♭7 A♭7 G♭7 D♭7 D7

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

Db7
Gb7
Db7
Gb7
Db7
Ab7
Gb7
Db7
D7

Analysis

Heard in Db major

Each chord's roman numeral and role in Db major
Chord	Numeral	Role
D♭7	V7/IV	Secondary dominant of IV
G♭7	IV7	Blues dominant
D♭7	V7/IV	Secondary dominant of IV
G♭7	IV7	Blues dominant
D♭7	I7	Blues dominant
A♭7	V7	Dominant
G♭7	IV7	Blues dominant
D♭7	I7	Blues dominant
D7	subV7	Tritone substitute for V7

Scales to play