s. leach

“The three triads you have learned so far are   1 3 5 Major 1 b3 5 Minor 1 b3 b5 Diminished or just ‘Dim’ Most chords you come across in music, no matter how complicated can normally be categorised into one of these basic types. Jazz chord progressions however are normally formed from richer sounding ‘7th chords’ which are the focus of this book.   There is, however, one more permutation that crops up occasionally, it is the augmented triad, 1 3 #5.”
― Joseph Alexander, Guitar Chords in Context: The Practical Guide to Chord Theory and Application

“Any ‘7th’ chord can be played in four different inversions: with either the root, 3rd, 5th or 7th in the bass.”
― Joseph Alexander, Guitar Chords in Context: The Practical Guide to Chord Theory and Application

“We can also flatten the 5th of the chord. The structure 1 3 b5 is not very common in music although it does sometimes occur in jazz. However, the structure 1 b3 b5 occurs frequently. It is called a diminished or occasionally a minor b5 chord.”
― Joseph Alexander, Guitar Chords in Context: The Practical Guide to Chord Theory and Application

“To create a major 7th chord we simply extend the ‘1 3 5’ formula by an extra note so it becomes ‘1 3 5 7’.”
― Joseph Alexander, Guitar Chords in Context: The Practical Guide to Chord Theory and Application