GETTING EMOTIONAL
Quite often, it’s not necessarily chords themselves that are sad, it’s more the movement between two particular types of chord that evokes the feeling of sadness. By using slightly more exotic, nondiatonic chords, we’re able to convey slightly different shades of emotion. Rather than just being straight-up happy or sad, we can use these to convey more subtle shades of sadness, like nostalgia or disappointment for instance. Try playing around with different
m7b5 combinations of major with minor, and ivdim chords to see what emotions you can magic up.