This article covers all things that are considered augmented in music. There are 3 kinds of augmented intervals that you will see in a handful of augmented chords or chords with augmented intervals. I also cover the 2 augmented scales and 6 augmented modes from the harmonic and melodic minor scales.
The 7#5b9 chord is one of the best altered 7th chords in my opinion. I have 10 open and closed chords for the 7#5b9 and E7#5b9 chords, as well as a chord I came up with: the 7#5b9/#9. I cover the intervals in the chord, the chord tones for the chords in the key of E and talk about how and when to use the chord.
Most guitar players are familiar with the 7#9 chord, and some may have used or seen a 7#5 chord as well. The 7#5#9 combines the 2 chords for a fantastic dominant 5 chord. I cover the intervals in the chord and the notes in a G7#5#9. I also have a few open and closed guitar chord shapes.
You can build major, minor and augmented triads from the augmented scale, all with major sevenths. I have C augmented scale guitar chord shapes and discuss how to use all the chords that are built from the augmented scale with examples of the chords in popular songs.