Chord sequence

Fm7, E7, Ebm7, D7

Fm7 E7 E♭m7 D7

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

Fm7
E7
Ebm7
D7

Analysis

Heard in C# major

Each chord's roman numeral and role in C# major
Chord	Numeral	Role
Fm7	♭iv7	Diatonic
E7	subV7/ii	Tritone substitute for V7/ii
E♭m7	ii7	Subdominant
D7	?	Outside the key (bII7)

Progressions in these changes

All the chords

Chromatic iii-bIII-ii-bII Progression in Db

The iii-VI-ii-V turnaround with both dominants replaced by tritone substitutes, so the roots descend by half steps from iii to I.

Scales to play