I–♭II–♭VII–I in B♭ Major

Pattern: I – ♭II – ♭VII – I Chords: B♭ – B – A♭ – B♭

Chord Breakdown

Numeral	Chord	Type	Function
I	B♭ (details)	major	Tonic
♭II	B (details)	major	Supertonic
♭VII	A♭ (details)	major	Subtonic
I	B♭ (details)	major	Tonic

Harmonic Analysis

This progression moves through B♭ (Tonic) → B (Supertonic) → A♭ (Subtonic) → B♭ (Tonic).

The I–♭II–♭VII–I progression borrows the exotic ♭II from Phrygian mode, creating a stark chromatic contrast against the major tonic. The ♭VII then provides a familiar stepping stone back to I. This pattern evokes Middle Eastern and Spanish flavors in a rock context.

Song Examples

Kashmir — Led Zeppelin
Wherever I May Roam — Metallica

Chord Details

B♭ B A♭

More Progressions in B♭ 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