Chord sequence
A♭m7 D♭7 Ddim7 E♭m7
In every key
Four-note rootless voicings in their two forms, with the 3rd or the 7th on the bottom, played over the root.
Heard in Eb minor
Chords 1 to 2
Abm7 Db7
Over Abm7 · iv7
Mode 2 of Major
Over Db7 · ♭VII7
Mode 5 of Major
Over Ddim7 · vii°7
Mode 7 of Harmonic Minor
Over Ebm7 · i7