I–IV–♭VII–I in D♭ Major

Pattern: I – IV – ♭VII – I Chords: D♭ – G♭ – B – D♭

Chord Breakdown

Numeral	Chord	Type	Function
I	D♭ (details)	major	Tonic
IV	G♭ (details)	major	Subdominant
♭VII	B (details)	major	Subtonic
I	D♭ (details)	major	Tonic

Harmonic Analysis

This progression moves through D♭ (Tonic) → G♭ (Subdominant) → B (Subtonic) → D♭ (Tonic).

A modal vamp built on the Mixolydian scale, using the characteristic ♭VII chord for a rock-influenced jazz flavor. This progression works well for modal jazz improvisation and funk-jazz fusion.

Song Examples

Chameleon — Herbie Hancock
Cissy Strut — The Meters

Chord Details

D♭ G♭ B

More Progressions in D♭ Major

I–IV–V–I I–V–vi–IV I–vi–IV–V ii–V–I I–IV–V I–♭VII–IV vi–IV–I–V I–V–vi–iii–IV–I–IV–V I–IV I–V IV–V IV–I