Chord sequence

Abm7b5, Db7alt

A♭m7♭5 D♭7alt

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

Abm7b5
Db7alt

Analysis

Heard in Gb major

Each chord's roman numeral and role in Gb major
Chord	Numeral	Role
A♭m7♭5	iiø7	Borrowed from Gb minor
D♭7alt	V7alt	Dominant

Progressions in these changes

All the chords

Minor ii-V Progression in Gb

The ii-V of a minor key: a half-diminished ii chord moving to an altered dominant, whose b9 and b13 are the 3rd and 6th of the minor key.

Scales to play