Chords
A chord is a group of three or more notes played simultaneously. Different types of chords can be formed by using different combinations of notes. The most basic type of chord contains three different notes and is called a triad. The most common triads are major chords. All major chords contain three notes taken from the major scale of the same letter name. These three notes are the 1 (first), 3 (third) and 5 (fifth) degrees of the major scale, so the chord formula for the major chord is:
The C Major Chord
The C major chord is constructed from the C major scale. When the major chord formula is applied to the C major scale, it can be seen that the C major chord contains the notes C, E and G.
C Major Scale
Once you have the correct notes for a C chord they can be arranged in any order. As long as the notes are still C, E and G, you still have a C chord. For example, a C chord could be played C E G, or E G C, or G C E, or even G E C. These various arrangements of the notes within a chord are called inversions. It is also possible to double notes within a chord. For example, the following diagram shows a common way of playing a C major chord on the guitar. It contains two C notes and two E notes. It is still a C major chord because it only contains notes called C, E and G. Doubling notes is common when playing chords on the guitar.
