Dm7b5, G7alt, Ebm7, Ab7, Bbmaj7 in Bb

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

Analysis

Heard in Bb major

Each chord's roman numeral and role in Bb major
Chord	Numeral	Role
Dm7♭5	iiiø7	ii of the ii-V to G7alt
G7alt	V7alt/ii	Secondary dominant, unresolved
E♭m7	iv7	Borrowed from Bb minor
A♭7	♭VII7	Borrowed from Bb minor
B♭maj7	Imaj7	Tonic