Ramsay
In a similar and responsive way Duality provides for the six major scales with flats.
The two new notes required for the scale of
F major are the B? of D, and the D of A minor;
for B? major, the E? of G, and the G of D minor;
for E? major, the A? of C, and the C of G minor;
for A? major, the D? of F, and the F of C minor;
for D? major, the G? of B?, and the B? of F minor;
for G? major, the C? of E?, and the E? of B? minor.¹ [Scientific Basis and Build of Music, page 90]