Chord sequence
Fm7♭5 B♭7 E♭m7 D7 D♭maj7
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 Db major
Chords 1 to 3
Fm7b5 Bb7 Ebm7
Chords 3 to 5
Ebm7 D7 Dbmaj7
Over Fm7b5 · iiø7/ii
Mode 7 of Major
Over Bb7 · V7/ii
Mode 5 of Melodic Minor
Over Ebm7 · ii7
Mode 2 of Major
Over D7 · subV7
Mode 4 of Melodic Minor
Over Dbmaj7 · Imaj7
The major scale and its modes are the most commonly used scales in western music.