Chord sequence

Cmaj7, C#dim7, Fm7, Bb7

Cmaj7 C♯dim7 Fm7 B♭7

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

Cmaj7
C#dim7
Fm7
Bb7

Analysis

Heard in C major

Each chord's roman numeral and role in C major
Chord	Numeral	Role
Cmaj7	Imaj7	Tonic
C♯dim7	♯i°7	Passing diminished
Fm7	iv7	Borrowed from C minor
B♭7	♭VII7	Borrowed from C minor

Progressions in these changes

Chords 3 to 4

Major ii-V Progression in Eb

Fm7 Bb7

Scales to play