Chord sequence
Amaj7 B♭dim7 Dm7 G7
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 major
Chords 3 to 4
Dm7 G7
Over Amaj7 · Imaj7
The major scale and its modes are the most commonly used scales in western music.
Over Bbdim7 · ♭ii°7
Mode 7 of Harmonic Minor
Over Dm7 · iv7
Mode 2 of Major
Over G7 · ♭VII7
Mode 4 of Melodic Minor