In
music or
music theory, the
supertonic is the second
degree or
note of a
diatonic scale, one
step the tonic. It is sung as
re in
solfege. In
music theory, the
supertonic chord may be symbolized by the
Roman numeral ii in a major scale, indicating that the chord is a
minor chord (for example, D-F-A in C major), or
ii in a
natural minor scale, indicating that the chord is a
diminished chord (for example, D-F-A in C natural minor), if in second inversion a six-four chord (A-D-F), and if the third is raised an
augmented sixth chord (A-F). If in major or minor, through the lowering of the second scale degree (also the sixth in major), the chord is major (D-F-A) then it is a
Neapolitan 6th chord, N
6 or II
6. The supertonic may be raised as part of the
common-tone diminished seventh chord, ii
7.
