Yes, it has been enlightening, though I'll admit I already knew the theory of how chords and keys (and their formulas) are derived from scales.... Some of the information is still slightly confusing, however... For instance, what is a Cadence, A leading tone, and, especailly, what is the difference between a scale and a [U]mode[/U]? People tell me that they are the same thing, though I dont know why that they would be called two different things... Currently, I'm under the impression that Modes are more about the [U]intervals[/U] of scales, not the specific degrees of each particular scale. I'm not frustrated at all, becuase I really want an understanding of theory, because, after all, it's beyond important; It's essential.