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There are tons of lists, books, web pages, blogs, computer programs, and everything else about chords.

There are no shortcuts.

Take all of the advice offered here, and anywhere else. You already own the best music-learning computer program on the planet, so congratulations on that. Get a harmony book or two from the public library. Check out the local community college for a class on Harmony 101. Do everything, and be patient.

I started out as a guitar player. Ultimately I found that I could not get to the higher levels of harmony understanding without being able to do the changes on the piano.

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Flatfoot sez: Call me when 'Talent-in-a-Box' is ready to ship! -- [8{>

Got some tunes on You Tube:
http://www.youtube.com/user/flatfoot50
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My BiaB lesson site:
http://jdwolfe0.wixsite.com/learnbiab