by Alex003 » Mon Mar 23, 2009 11:15 pm
First off, to introduce me to the theory he had me start on A, 6th string. Do perfect 4ths down the neck till you hit the High E string. You start on A, but where did you end up if you do perfect 4ths? You end up on A#. Something doesn't make sense there, something happened. So its the theory of understanding how it got to that change.
The guitar is split into two universes my guitar teacher told me, strings E, A, D, and G are one universe. the B and high E are the other universe. This 2nd universe, we can say had a natural disaster of some kind and moved everything up a fret.
Theoretically, the open E major chord shape should be the basis of all major shapes. Move it down a string, keeping the same shape and you have an A Minor chord. Why did it change from major to minor? It crossed into the 2nd universe. So you have to calculate the change, by moving the minor 3rd and making it a major 3rd, Thus making the A Major chord. Once again, take the original E major shape and play it another set of strings down, which this time makes a very un pleasant sound. Calculate the change for crossing the universe, and you end up with a D major chord.
I thought it was really amazing how all the chords are connected in that way. If you think about it, they are all the same shape, that E major shape is always the major shape for those open chords, with A and D you are just calculating for the change in the strings.
The theory goes alot deeper into than that, but I am yet to have another guitar lesson, haha but i thought some of you would find that interesting