Chords

half-diminished, diminished and augmented

part 1: diminished and augmented triad chords – E & A shapes

aug and dim triad chord intervals - A shape
aug and dim triad chord intervals - E shape

part 2: half-diminished, diminished 7 and augmented 7 chords

pdfs:

half dim, dim and aug chords

The Half-Diminished Chord

half-diminished chord worksheet

The Diminished Chord

The Augmented Chord

overview

half-diminished vs. diminished

augmented triad and 7th chords

augmented vs. diminished

how to use diminished chords in songwriting

more advanced analysis of diminished chords

how they can be interweaved with an extended I chord and how diminished chord is a rootless dominant 7 b9 chord