One thing I have discovered about us Uke players is that, as a whole, we know very little about music
theory. Sure, we can play all sorts of fancy chords and whatnot right and left, but when asked why
something is a chord, many of us have no clue what the answer is. Over the next few days I am planning on
making a music theory 101 course so you all will understand enough basic music theory to not have to rely
on chord charts and the like to figure out chords when playing a song.
Today’s lesson will be covering the basic triad chords: Major Chords, Minor Chords, Augmented Chords, and
Diminished Chords.
I guess the easiest way to explain the basic major triad chord is this:
Pick a note, any note.
Let’s pick ‘G’
Now, you count up four half steps, or a major third, from this note.
G…. G#…. A… Bb… B
…….1…….2…..3…..4
Then, you take three half steps up from the new note, which makes as a major fifth from the first note.
B…. C…. C#…. D (which is the same as G… G#… A… Bb… B… C… C#… D)
…….1…..2…….3
The resulting ‘G Major’ triad is GBD. Whenever you play these three notes, you are playing a G Major
chord.
Things become a little more fun when you start on a sharp.
Let’s start with a C#.
You get the major third….
C#…. D…. Eb…. E…. F
And the Major fifth…..
F…. F#…. G…. G#…
And you now have a C# major triad: C# F G#
For a Minor chord, you take the following….
The Root Note, a Minor 3rd, and a 5th
You already know how to get a 5th above the root, so let’s work with the Minor 3rd.
A minor third is simply the note three half steps above the root note.
To demonstrate, let’s construct an A Minor chord.
A is our root note.
To find the minor 3rd…..
A… Bb…. B…. C
……1……2…..3
And then we must be careful that when constructing the fifth, we base it off of the root note, not the
minor third, as that wold yield a minor 5th.
A…. Bb…. B…. C… C#… D….. D#… E
…….1…….2…..3….4……5……6……7
So an A minor chord is A C E
Now take a breath, because things are about to get a bit more interesting.
To take things a step further, We’ll construct an Augmented Chord (Aug.)
An augmented chord consists of the Root, a Major 3rd, and an Augmented 5th, which is the same as a Major
fifth except you go one half step higher (8 half steps from the root note, as opposed to 7)
An F Aug. chord would be constructed as follows…
F is our root note
The major third…
F… F#… G… G#… A
and an Augmented 5th
F… F#… G… G#… A… Bb… B… C… C#
…..1…….2…..3…..4…..5…..6….7….8
The resulting triad of an Augmented F chord is F A C#
Now, to wrap things up, I’ll explain how to construct a diminished (Dim.) chord.
A diminished chord is constructed by taking the root note, its minor third, and a diminished 5th, which
is a major 5th lowered by one half step (6 half steps above the root note, as opposed to 7).
Let’s make a D diminished chord.
D is our root note.
We construct the minor third for the root.
D… Eb… E… F
……1…..2….3
And we construct the diminished 5th
D… Eb… E… F… F#… G… G#
…….1….2….3…..4…..5…..6
The resulting triad is D F G#, D Diminished.
And that pretty much sums up the basics of chord construction.
With a little practice, you will no longer need to reference a chord chart every time you come across a
chord that you don’t know by heart. You will also be able to figure out different ways to play common
chords higher up on the fret board, using alternate fingerings, or duplicating different notes to put
emphasis on different parts of the chord.