Chord sequence
C♭maj7 A♭m7 D♭m7 C7
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 Cb major
Over Cbmaj7 · Imaj7
The major scale and its modes are the most commonly used scales in western music.
Over Abm7 · vi7
Mode 6 of Major
Over Dbm7 · ii7
Mode 2 of Major
Over C7 · subV7
Mode 4 of Melodic Minor