Chord sequence
B♭m7 E♭7 Edim7 Fm7
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 minor
Chords 1 to 2
Bbm7 Eb7
Over Bbm7 · iv7
Mode 2 of Major
Over Eb7 · ♭VII7
Mode 5 of Major
Over Edim7 · vii°7
Mode 7 of Harmonic Minor
Over Fm7 · i7