Chord sequence

Gbmaj7, Amaj7, Dmaj7, Gmaj7

G♭maj7 Amaj7 Dmaj7 Gmaj7

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

Gbmaj7
Amaj7
Dmaj7
Gmaj7

Analysis

Heard in Gb major

Each chord's roman numeral and role in Gb major
Chord	Numeral	Role
G♭maj7	Imaj7	Tonic
Amaj7	♭IIImaj7	Borrowed from Gb minor
Dmaj7	♭VImaj7	Borrowed from Gb minor
Gmaj7	♭IImaj7	Borrowed from Gb minor

Progressions in these changes

All the chords

Tadd Dameron Turnaround in Gb

A turnaround of major 7th chords on I, bIII, bVI and bII, named after the bebop composer and arranger Tadd Dameron.

Scales to play