Letter offset of a chord tone above the root, from its interval in semitones and the
rest of the chord (pcs: the chord's intervals mod 12): 6 is b5 without a perfect fifth
and #11 with one; 8 is #5 or b13; 3 is #9 when the chord has a major third; 9 is the
bb7 of a diminished seventh.
Letter offset of a chord tone above the root, from its interval in semitones and the rest of the chord (
pcs: the chord's intervals mod 12): 6 is b5 without a perfect fifth and #11 with one; 8 is #5 or b13; 3 is #9 when the chord has a major third; 9 is the bb7 of a diminished seventh.