Aimed at songwriters, this writing addresses aspects of Chord Theory. It suggests that there are seven parts of this concept that should be made familiar to all songwriters. Identifying the key of the song, learning about diatonic chords, how some chord progressions work and others don’t, the use of roman numerals for chord identification, inversion chords, non-chord tones, and the use of transposition are covered.
Some good points. Read in full:
The 7 Bits of Chord Theory Songwriters Need to Know