Augmented Sixth Chords

If we have a minor chord in first inversion the interval between the bass note and the root of the chord is a Major sixth.If we then raise the tonic note (by an augmented unison), the interval between the bass note and root note becomes an augmented sixth. A chord with this interval of an augmented sixth is called an Augmented Sixth Chord. The three basic types of Augmented sixth chords:An