Chord sequence

Abm7, Em7, A7, Dmaj7, Cm7, F7, Bbmaj7, Abm7, Db7, Gbmaj7

A♭m7 Em7 A7 Dmaj7 Cm7 F7 B♭maj7 A♭m7 D♭7 G♭maj7

120 BPM
Voicing family

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 Gb major

Each chord's roman numeral and role in Gb major
Chord Numeral Role
A♭m7 ii7 Subdominant
Em7 ii7/♭VI ii of the ii-V to bVI
A7 V7/♭VI Secondary dominant of bVI
Dmaj7 ♭VImaj7 Borrowed from Gb minor
Cm7 ii7/III ii of the ii-V to III
F7 V7/III Secondary dominant of III
B♭maj7 ? Outside the key (IIImaj7)
A♭m7 ii7 Subdominant
D♭7 V7 Dominant
G♭maj7 Imaj7 Tonic

Progressions in these changes

Scales to play