FROSTY'S HELL CHORDS!
Two hands31, I read your post again.
It is logical but in theory (literally, hehe):
-A dim2 is the same as the root. It's useless nomenclature.
-Aug2/Dim3 is also clumsy notation, because they're the same thing as a major 2nd and don't really exist! (Ever heard it in a chord name? I think not.)
-Aug3 would equal a perfect fourth. What's the reason to have an Aug3 in your chord? You can only have one third, so "A D E" would be Asus4, not Aaug3 (because that would imply a major and an "augmented" third [which doesn't truly exist]).
-Dim4 would equal a major third. More clumsy nomenclature - I haven't seen it anywhere.
-Dim6 is the same as a perfect 5th. Using "perfect 5th" is a lot more direct, and I haven't seen Dim6 anywhere either.
-Aug6 is a flat seventh. It wouldn't make sense to call "A C# E G" Aaug6 would it? It's A7.
-An aug7 is equal to an octave. Using "aug7" is cumbersome. When I hear "aug7" I think of the chord formula 1 3 #5 b7.
In other words, augmented and perfect only apply to 4ths and 5ths; diminished, only to 5ths and 7ths; and major and minor to 2nds, 3rds, 6ths, and 7ths. Not every non-4th/5th interval has a diminished and augmented version...
(Edited by sixstringphoenix at 7:47 pm on Nov. 25, 2001)