This must been asked a million times but I'm not really sure what to search so I'll ask.

How can a progression be in the key even if it has flattened some chord like in wikipedia http://en.wikipedia.org/wiki/Chord_progression

Blues-modal progression? Please someone smarter than me explain.


* I - ♭III - IV.
* I - ♭III-IV-♭VI.
* I - ♭III-IV-♭VI-♭VII.
* I - ♭III - ♭VII - IV.
* I - ♭III-♭VII-♭VI.

Because aren't like major progressions 1maj 2min 3min 4maj 5maj 6min 7dim and minor progressions 1min 2dim 3maj 4min 5 min 6maj 7maj?
Last edited by Punkismygod at Sep 13, 2008,
You could equate it to playing a passing tone or outside tone while you're in a key. It distracts and adds tension. Donno bout the blues/modal thing though.
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Those Blues-Modal chord progressions are based on borrowing chords from the parallel minor key.
So in C major, the chords are C Dm Em F G Am Bdim
In C minor, the chords are Cm Ddim Eb Fm Gm Ab Bb

So the I bIII IV bVI bVII would be C Eb F Ab Bb, where Eb Ab and Bb are borrowed from C minor
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