Chord sequence
Gm7 D7 D♭maj7 B♭7 Amaj7 G♭7 Fmaj7
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 F major
Over Gm7 · ii7
Mode 2 of Major
Over D7 · subV7/♭VI
Mode 4 of Melodic Minor
Over Dbmaj7 · ♭VImaj7
Mode 4 of Major
Over Bb7 · subV7/III
Over Amaj7 · ?
The major scale and its modes are the most commonly used scales in western music.
Over Gb7 · subV7
Over Fmaj7 · Imaj7