Chord sequence

Bbmaj7, G7, Cm7, F7

B♭maj7 G7 Cm7 F7

Tempo 120 BPM

Rootless Shells Guide tones Rooted shells Rooted Drop 2

Four-note rootless voicings in their two forms, with the 3rd or the 7th on the bottom, played over the root.

Customize each chord

Bbmaj7
G7
Cm7
F7

Analysis

Heard in Bb major

Each chord's roman numeral and role in Bb major
Chord	Numeral	Role
B♭maj7	Imaj7	Tonic
G7	V7/ii	Secondary dominant of ii
Cm7	ii7	Subdominant
F7	V7	Dominant

Progressions in these changes

All the chords

Major I-VI-ii-V Progression in Bb

The standard turnaround back to the top of a major tune, with VI7, the dominant of ii, in place of the diatonic vi chord.

Scales to play