Chord sequence

Bb7, Eb7, Bb7, Eb7, Bb7, Cm7, B7, Bb7, B7

B♭7 E♭7 B♭7 E♭7 B♭7 Cm7 B7 B♭7 B7

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

Bb7
Eb7
Bb7
Eb7
Bb7
Cm7
B7
Bb7
B7

Analysis

Heard in Bb major

Each chord's roman numeral and role in Bb major
Chord	Numeral	Role
B♭7	V7/IV	Secondary dominant of IV
E♭7	IV7	Blues dominant
B♭7	V7/IV	Secondary dominant of IV
E♭7	IV7	Blues dominant
B♭7	I7	Blues dominant
Cm7	ii7	Subdominant
B7	subV7	Tritone substitute for V7
B♭7	I7	Blues dominant
B7	subV7	Tritone substitute for V7

Scales to play