EMT Lesson Three How to create and play chords
An augmented chord is similar to a major chord but with a raised (sharpened or augmented) fifth. An augmented chord is built with a root note, major third and raised (augmented) fifth.
For example, the notes of the augmented chord rooted on A (see Figure 7, below) are therefore: A, C#, E#.
Figure 7. Forming the augmented chord rooted on the note of A. (Enlarge)
Augmented chord: 1, 3, #5