Zero3,

That question is a little above my music theory skill level, but since no one else is jumping in to take a stab at it, here goes …

I don’t think the 1 chord should have a major 6th in it. It should be mM7th chord. I think that chord spelling would be 1-3b-5-7, (not flatted 7th.) Since that chord doesn't include a 6th of any color, a major 6th seems improper. The scale should include a 6b.

That’s because when harmonizing a diatonic minor chord progression, you don’t use the natural minor scale, aka Aeolian mode. You use the harmonic minor scale which has a raised 7th note.

I wish I was knowledgeable enough to elaborate more, but here is an article that may shed more light on it. I could be totally off base on this, but at least I offered you a theory! smile


Exploring the Theory Behind Minor 2-5-1 Progressions

http://www.jazzguitartips.com/jazz-guitar-chords/theory-minor-2-5-1-progressions/


Bob
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http://soundcloud.com/bobcflatpicke/music-in-the-mountains