Chord sequence

Cbmaj7, Cdim7, Fbm7, A7

C♭maj7 Cdim7 F♭m7 A7

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

Cbmaj7
Cdim7
Fbm7
A7

Analysis

Heard in Cb major

Each chord's roman numeral and role in Cb major
Chord	Numeral	Role
C♭maj7	Imaj7	Tonic
Cdim7	♯i°7	Passing diminished
F♭m7	iv7	Borrowed from Cb minor
A7	♭VII7	Borrowed from Cb minor

Progressions in these changes

Chords 3 to 4

Major ii-V Progression in D

Fbm7 A7

Scales to play