Bbm7, D7, Emaj7, Bb7, Cmaj7, Gb7, Abmaj7 in Ab

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

Analysis

Heard in Ab major

Each chord's roman numeral and role in Ab major
Chord	Numeral	Role
B♭m7	ii7	Subdominant
D7	V7/vii	Secondary dominant, unresolved
Emaj7	♭VImaj7	Borrowed from Ab minor
B♭7	V7/V	Secondary dominant, unresolved
Cmaj7	?	Outside the key (IIImaj7)
G♭7	♭VII7	Borrowed from Ab minor
A♭maj7	Imaj7	Tonic