Here is the official post on Structure of Chords and Triads for everyone who is wondering what triads are and how the hell people came up with chords based off of scales and triads.
First to start off get a good look at Darko's scale page to get a good idea of scales, mainly the major ones. A major
scale is just , Whole Step, Whole, Half, Whole, Whole, Whole, Half Step, and the notes are A, B flat, B, C, D flat, D, E flat,
F, G flat, G, A flat, A.( I didnt take the time to actually do the correct notation on which notes are considered flat or sharp IE-B flat or A Sharp,
But i think youll still understand)
Now on to scales, First is the Triad Chords. A Triad is the easiest type of chord, Each triad contains three notes stacked a third appart from one another.
You build the triad off the Tonic (or root) Position of a scale and go up in thirds. Ex-C major Triad C-E-G, (so there is a third between 1 & 3 and a third between 3 & 5)
The quality of a triad is based on its structure. There are 4 possible qualities, Major, Minor, Augmented, and Diminished.
Augmented triads are considered altered chords because they never happen naturally within a chord scale (or a scale tonic)
These are formulas for building each quality of triad.
Building Triads
In Major Scale/Key the 1, 4, and 5 chords are always major, EX in the key of Cmaj, 1=Cmaj 4=Fmaj 5=Gmaj. The 2, 3, and 6, chords are minor, Ex in Cmaj, 2=Dmin 3=Emin 6=Amin. And the 7 chord is diminished. And in Every Minor Key the 1, 4, and 5 are major, the 3, 4, and 7 are minor, and 2 is diminished.
Natural Minor is just the Aeolian Mode. Here are some Practices.
There are also inverted triads, theres a 1st inverted triad and a second inverted triad. To invert a triad all you do is take the 1,3,5 and switch the around. For example a 1st inverted D-major triad would 3,5,1 or f#,a,d. And a second inverted D-Major triad would be 5, 1, 3 or a, d, f#. Fairly simple.
Here is a pic of a bunch of Triads and inverted triads.
Triad Inversions
Next Section will be on the building of basic chords. Such as power chords, and normal chords like E and C and what not. (I cant really explain things that well through typing) -COMING SOON-