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Music Theory for Computer Musicians by Michael Hewitt

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17. Major, Minor, Augmented, and Diminished Triads

Most of the chords you use in your music will probably be major and minor—the so-called common triads. When you get used to using these, hopefully you will also start to explore and use some more complex chords. This will no doubt include those chords of the seventh, ninth, eleventh, and thirteenth, which you will study in Chapter Chapter 21, “Chords of the Seventh,” and Chapter Chapter 23Complex Harmony.” As a preliminary foundation for this exploration, it will benefit you greatly to study the complete range of triads available, in addition to the major and minor common triads.

Major and minor triads differ only in respect to their “sweet note”—the third. In the case of the major triad, ...

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