Chord sequence

Dm7b5, G7alt, Cm7, F7, Bbmaj7

Dm7♭5 G7alt Cm7 F7 B♭maj7

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

Dm7b5
G7alt
Cm7
F7
Bbmaj7

Analysis

Heard in Bb major

Each chord's roman numeral and role in Bb major
Chord	Numeral	Role
Dm7♭5	iiø7/ii	ii of the ii-V to ii
G7alt	V7alt/ii	Secondary dominant of ii
Cm7	ii7	Subdominant
F7	V7	Dominant
B♭maj7	Imaj7	Tonic

Progressions in these changes

All the chords

Minor ii-V to ii-V-I Progression in Bb

A minor ii-V aimed at the ii chord, then the ii-V-I: the ii is approached as if it were a key of its own.

Scales to play