Chord sequence
B♭m7 E♭m7 B♭m7 G♭7 F7alt B♭m7 Bdim7 Cm7♭5 F7alt
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 Bb minor
Chords 8 to 9
Cm7b5 F7alt
Over Bbm7 · i7
Mode 2 of Major
Over Ebm7 · iv7
Over Gb7 · ♭VI7
Mode 4 of Melodic Minor
Over F7alt · V7alt
Mode 7 of Melodic Minor
Over Bdim7 · ♯i°7
Mode 7 of Harmonic Minor
Over Cm7b5 · iiø7
Mode 7 of Major