The Phrygian Modes is the third mode. In the DO, Re Mi.. phrase, it is the MI tone. In regards to Ionian, Phrygian would be 3, 4, 5, 6, 7, 1, 2, 3, but instead of looking at it from the perspective of Ionian it is nice to look at the 3 as a 1. If we do so then the intervals would instead be 1, b2, b3, 4, 5, b6, b7, 1. Thus when playing the Phrygian with a common chord one would use a minor chord, and thus it is indeed a Minor scale. Phrygian has a little more interesting minor scale feel than the common Aeolian minor mode. Phrygian is a cool mode that one can use to express some sort of feel that is good for a minor key. Perhaps something melancholy, or something enumerating problems with a situation.
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