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An altered chord is one that contains notes from outside its scale of origin – chords such as b9 or #5 are frequently seen examples of this. What the example chords are designed to demonstrate is how ...

Here's a simplified tale of music theory. The seventh note of a major scale is very powerful. In G major the notes are G, A, B, C, D, E, F#, so we're talking about ...

The "Neapolitan 6th" chord (N6) is another sonority whose definition is based on the triad that it makes, which is a vertical perspective that glosses over its actual horizontal function. It is ...