Chord sequence

Bm7b5, Bb7#11, Am7, Ab7, Gmaj7

Bm7♭5 B♭7♯11 Am7 A♭7 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

Bm7b5
Bb7#11
Am7
Ab7
Gmaj7

Analysis

Heard in G major

Each chord's roman numeral and role in G major
Chord	Numeral	Role
Bm7♭5	?	Outside the key (iiiø7)
B♭7♯11	subV7♯11/ii	Tritone substitute for V7/ii
Am7	ii7	Subdominant
A♭7	subV7	Tritone substitute for V7
Gmaj7	Imaj7	Tonic

Progressions in these changes

Chords 3 to 5

Tritone Sub ii-V-I Progression in G

Am7 Ab7 Gmaj7

Scales to play