Chord sequence

Bbmaj7, Dbmaj7, Gbmaj7, Bmaj7

B♭maj7 D♭maj7 G♭maj7 Bmaj7

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

Bbmaj7
Dbmaj7
Gbmaj7
Bmaj7

Analysis

Heard in Bb major

Each chord's roman numeral and role in Bb major
Chord	Numeral	Role
B♭maj7	Imaj7	Tonic
D♭maj7	♭IIImaj7	Borrowed from Bb minor
G♭maj7	♭VImaj7	Borrowed from Bb minor
Bmaj7	♭IImaj7	Borrowed from Bb minor

Progressions in these changes

All the chords

Tadd Dameron Turnaround in Bb

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

Scales to play