Chord sequence
Am7 Dm7 Am7 F7 B♭7♯11 Am7 Bm7♭5 B♭7♯11
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 A minor
Over Am7 · i7
Mode 2 of Major
Over Dm7 · iv7
Over F7 · ♭VI7
Mode 4 of Melodic Minor
Over Bb7#11 · subV7♯11
Over Bm7b5 · iiø7
Mode 7 of Major