Chord sequence

Cm7b5, F7alt

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

Cm7b5
F7alt

Analysis

Heard in Bb major

Each chord's roman numeral and role in Bb major
Chord	Numeral	Role
Cm7♭5	iiø7	Borrowed from Bb minor
F7alt	V7alt	Dominant

Progressions in these changes

All the chords

Minor ii-V Progression in Bb

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