Diatonic Chord Explorer
Select any key and inspect practical harmonic material instantly: triads, 7th chords, extension options (9, 11, 13), and modal interchange possibilities.
Triads
Primary 3-note harmony by scale degree.
7th Chords
Stacked tertian harmony including the seventh.
Extensions (9, 11, 13)
Usable color tones by degree for this convention.
Modal Interchange
Borrowed harmony from the parallel mode.