Originally Posted by: Julian VickersI'm the deputy theory buff round here, maybe I can help out.
I'll start from the start. Now I know what inverted intervals are:
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----7---------------------------------
----5---when inverted becomes---5----
--------------------------------- 5----
5th 4th
the notes are D and A and all that I've done is switched the A to an octave below for the second one.
A 5th when inverted becomes a 4th.... now add 5 + 4 together,
it equals 9!
Let's try it with somthing else...
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----------2----------------------------
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----------3-------to-------3------------
---------------------------5----------
6th 3rd
6 + 3 = 9!
I hope you understood. If you didn't I'll try to make a better explanation.
edit: Oh yeah I should probably say that the fact that they add up to 9 isn't useful when it comes to actually making music. It's just a nice little piece of music theory trivia.
right on Mr. Vickers I was just trying to get a rise...RTO