I'll try to see if I explain it right this way. I'm not great at theory. If I am wrong or if there is an easier way to explain it Jolly will be here. I just wanna take a crack at it to see if I'm right.

Let's take a C Major Scale

C D E F G A B C

If I Augment the second (D) to D# It would be an enharmonic note to Eb.

Now I don't know my chord construction at all :o (Jolly you can help me with this later?) so I will generalize.


You usually make chords out of 1st (C) a third (E) and a Fifth (G).

If you want an augmented second chord you woud move the second up a half step D->D# so It would C D# G

Technically D#=Eb but you can't write Eb in as an augmented second becuase writing an E would imply that you are flattening a third. In turn You Can't write D# in as Eb in a chord formula for a minor third because D# is implying a move up from the second.

It's for the sake of using presice, exact, correct terminology when breaking down the theory behind the music. I know this probably isn't the perfect explaination but it's how I think it works. If I'm wrong Jolly, swap out my wrong words for the right ones. :D