Chord sequence
G♭m7 C♭m7 G♭m7 D7 A♭m7♭5 D♭7alt G♭m7 A♭m7♭5 D♭7alt
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 Gb minor
Chords 5 to 7
Abm7b5 Db7alt Gbm7
Chords 8 to 9
Abm7b5 Db7alt
Over Gbm7 · i7
Mode 2 of Major
Over Cbm7 · iv7
Over D7 · ♭VI7
Mode 4 of Melodic Minor
Over Abm7b5 · iiø7
Mode 7 of Major
Over Db7alt · V7alt
Mode 7 of Melodic Minor