( ( "C: vii°7" ) ( "B" "D" "F" "Ab" ) ( "Null" "1" "24d. HOW TO SPELL vii°7 IN EACH KEY" "The leading-tone scale-step is a different note-name, one half-step below the indicated tonic. Spell a diminished triad with the leading-tone scale-step as root. Add a minor 3rd above the triad fifth." " " ) )