Improvise in Phrygian Mode
Introduction
(For more information about building modes, see Understanding Modal Harmony.)
The Phrygian mode is similar to the minor scale, but with a ♭2. A Phrygian vamp will tend to focus on the ♭2 sound. So you'll the I tonic chord (sometimes colored with ♭2), with other chords also supporting the ♭2, for instance ♭IImaj.
The tracks here are focused on learning to improvise in A Phrygian. The ♭2 of the scale is B♭ (instead of the B which would appear normally in A minor.
The three backing tracks presented here offer the chance to improvise in A minor only, (“C”), A Phrygian only (“D”) and a track that switches back and forth between the two (“CD”).
The Chord Progression
Note that there are three tracks: one for “C,”, one for “D”, and one for “CD”.

A Aeolian (Minor)
A Phrygian
Track “C” — A Minor Only
Track “D” — A Phrygian Only
Track “CDH” — A Minor, A Phrygian
