Originally Posted by: CSchlegel
But just for a little further clarity. You are correct that the 9th degree is intended to be used in the context of "higher than the octave of the root". But it is generally accepted that the 2nd & 9th scale degrees are interchangeable in some contexts regardless of octave position. Often a chord is labeled sus2 even if the 2nd is in a higher octave.

But, but...

it's a fundamentally different sound!

I get that you are merely relaying the established consensus;

but that's silly:

the pitch of the 9th degree is actually double in frequency of the 2nd.
It's the same reason I'll play the same chord an octave higher than I did previously: for the comparative effect!

So I was giddy when I realized the difference within the same given chord.

*sighs*

I shall take solace in the fact that I can still capitalize on the nuance I've discovered;
even if the status quo is all like "[yeah that's all actually considered the same thing.]"

But now that I rant about it I just realized that what I notated was actually a Sus9 according to my own definition
: /